Instant Hotspot is a wireless feature that allows you to use your iPhone to provide wireless internet access to your Mac without a password. It is one of the Continuity features that Apple provides for its devices. Instant Hotspot uses Wi-Fi, Bluetooth, and iCloud to automatically connect your Mac to your iPhone's cellular internet when Wi-Fi is not available. You just need to click the Wi-Fi icon on your Mac and choose your iPhone from the list of available networks. You don't need to enter a password or set up a Wi-Fi hotspot manually. Instant Hotspot requires a Mac running OS X Yosemite or later and an iPhone with iOS 8.1 or later and a cellular data plan. Both devices must be signed in with the same Apple ID and have Bluetooth and Wi-Fi turned on. References: Share your internet connection from iPhone - Apple Support, How To Tether iPhone Data To A Mac When There's No Wi-Fi Or Internet

This is the correct answer because Activity Monitor is a built-in macOS utility that allows you to see how much CPU, memory, disk, and network resources are being used by each app and process on your Mac. You can use Activity Monitor to identify and quit apps that are consuming a large percentage of your CPU or memory, or that are not responding. This can help you improve the performance and responsiveness of your Mac. To launch Activity Monitor, you can use Spotlight (Command+Spacebar) and search for it, or find it under Applications > Utilities. You can sort the apps and processes by clicking on the column headers, such as "% CPU" or "Memory". You can also use the search field to filter the list by name. To quit an app or process, select it and click on the "X" button at the top of the window. You can also use the View menu to see more information about the app or process, such as its open files and ports, its memory usage, or its energy impact. References: How to See Which Program Is Using All Your CPU on Mac, If your Mac runs slowly - Apple Support, How to Fix Crashing Apps on a Mac - How-To Geek

Connection Doctor is a built-in tool in Mail that helps you diagnose and fix problems with your email accounts and connections. It shows the status of each account, whether it is online or offline, and any errors that occurred. It also lets you test the connection to the incoming and outgoing mail servers, and view the details of the connection attempt. Connection Doctor is the first tool you should use when you encounter Mail connectivity issues in macOS, as it can help you identify the source and nature of the problem quickly and easily. References: = Apple Device Support Exam Prep Guide, page 11; [Mail User Guide for Mac], section
"Check the status of your email accounts".

Option B shows an image of the iPad Air (4th generation), which is compatible with the Apple Pencil (2nd generation). The other options show images of the iPad Air (3rd generation), which is compatible with the Apple Pencil (1st generation). The iPad Air (4th generation) has a USB-C port, a 10.9-inch Liquid Retina display, and a Touch ID sensor on the top button. The iPad Air (3rd generation) has a Lightning port, a 10.5- inch Retina display, and a Touch ID sensor on the Home button. The Apple Pencil (2nd generation) has a flat edge that attaches magnetically to the side of the iPad for pairing and charging. The Apple Pencil (1st generation) has a round shape and a removable cap that covers a Lightning connector for pairing and charging. References: Apple Pencil compatibility - Apple Support, Identify your iPad model - Apple Support, iPad Air - Technical Specifications - Apple