A variable is a named container that can store a value of a certain data type, such as a number, a string, or a Boolean. A variable can be reused throughout a program by referring to its name, and its value can be changed or reassigned as needed. For example, in the following Python code, x is a variable that is assigned the value
10, then reassigned the value 20:
A method is a set of instructions that performs a specific task, usually associated with an object or a class. A method can take parameters as inputs and return a value as output, but it cannot be reassigned to another value.
For example, in the following Python code, print is a built-in method that takes a parameter and prints it to the console, but it cannot be assigned to another value:
A constant is a named container that can store a value of a certain data type, but unlike a variable, its value cannot be changed or reassigned once it is defined. Constants are usually used to store values that are fixed or constant, such as mathematical constants, physical constants, or configuration settings. For example, in the following Python code, PI is a constant that is assigned the value 3.14, and it cannot be reassigned to another value:
A function is a named block of code that performs a specific task, usually independent of an object or a class.
A function can take parameters as inputs and return a value as output, but it cannot be reassigned to another value. For example, in the following Python code, add is a user-defined function that takes two parameters and returns their sum, but it cannot be assigned to another value:
Therefore, the correct answer is B.
Variable, as it defines a reusable value that can be reassigned.
References:
CompTIA IT Fundamentals+ (ITF+) Certification Exam Objectives, page 16, section 4.1 CompTIA IT Fundamentals+ (ITF+) Study Guide, page 207, section 8.1 CompTIA IT Fundamentals+ (ITF+) All-in-One Exam Guide, Second Edition, page 301, chapter 9

HDMI and VGA are the connectors that should be available in the conference room to ensure everyone can use the conference room projectors. HDMI and VGA are types of video connectors that are used to connect a video source, such as a laptop, to a video output, such as a projector. HDMI stands for High-Definition Multimedia Interface, which is a digital connector that can transmit high-quality video and audio signals over a single cable. VGA stands for Video Graphics Array, which is an analog connector that can transmit standard-definition video signals over a 15-pin cable. HDMI and VGA are common video connectors that are found on old and new laptops, respectively. Having both HDMI and VGA connectors in the conference room can ensure compatibility and connectivity for different laptops and projectors. Reference : The Official CompTIA IT Fundamentals (ITF+) Study Guide (FC0-U61), page 40.

1: A concurrent license is a type of software license that allows a software program to be installed on as many computers as the company wants, but only a limited number of users can use the software at the same time. A concurrent license is based on the number of simultaneous users rather than the number of installations. A concurrent license can help a company save money and resources by sharing the software among multiple users who do not need to use the software all the time. Reference : The Official CompTIA IT Fundamentals (ITF+) Study Guide (FC0-U61), page 211.

When working with storage, different units of measurement are used to express the amount of data.
The most common units are bytes (B), kilobytes (KB), megabytes (MB), gigabytes (GB), terabytes (TB), and petabytes (PB).
Each unit is equal to 1,000 of the previous unit, except for bytes, which are the smallest unit.
Therefore, 1,000,000MB can also be notated as 1,000GB or 1TB. The other options are incorrect because they are either too large or too small to represent 1,000,000MB. For example, 0.01PB is equal to 10,000GB or 10TB, which is much larger than 1,000,000MB. Similarly, 100GB is equal to 100,000MB or 0.1TB, which is much smaller than 1,000,000MB. And 10,000,000KB is equal to 10,000MB or 0.01TB, which is also much smaller than 1,000,000MB.
References:
CompTIA IT Fundamentals FC0-U61 Certification Study Guide, page 71, section 1.6: "A terabyte (TB) is 1,000 gigabytes."
CompTIA ITF+ Practice Test, question 230: "1TB is the correct answer."