Explanation
To migrate an APEX app between environments, such as from development to production, you need to consider three components that make up an APEX app:
Database objects: These are the tables, views, procedures, functions, packages, triggers, sequences, synonyms, and other schema objects that store or manipulate the data used by the app. You need to move these objects from the source schema to the target schema using tools such as SQL Developer, Data Pump Export/Import, or Data Workshop.
Images: These are the static files, such as images, CSS files, JavaScript files, or PDF files, that are used by the app for display or download purposes. You need to move these files from the source web server to the target web server using tools such as FTP, SCP, or File Explorer.
Application definition and all associated files: These are the metadata files that define the app components, such as pages, regions, items, buttons, processes, validations, computations, dynamic actions, shared components, and so on. You also need to include any supporting object definitions or data scripts that are used to create or populate database objects for the app. You need to move these files from the source APEX instance to the target APEX instance using tools such as App Builder Export/Import or One-click Remote Application Deployment.

Explanation
In a Classic Report, an end user can perform the following actions:
Filter values of a column in the report by using the Search Bar. This bar allows the user to enter a search string and apply it to one or more columns in the report.
Sort the columns of the report by clicking on the column headers. This action toggles the sort order between ascending and descending for the selected column.
The other options are incorrect because:
Create Control Breaks in the report is not an action that an end user can perform in a Classic Report.
This action is only available in an Interactive Report by using the Control Break option in the Actions menu.
Rearrange the columns in the report is not an action that an end user can perform in a Classic Report.
This action is only available in an Interactive Grid by using the Reorder option in the Actions menu.
Verified References: [About Classic Reports] [Searching Classic Reports] [Sorting Classic Reports]

Explanation
A workspace is a logical work area that enables multiple users to work within the same Oracle APEX installation while keeping their objects, data, and applications private. Creating and managing an APEX workspace involves the following statements:
During workspace creation, you can associate the workspace with an existing database schema or create a new schema for the workspace. A schema is a collection of database objects such as tables, views, indexes, etc. that belong to a user.
A workspace enables multiple users to work within the same Oracle APEX installation. Each user can have a different role and privilege in the workspace, such as workspace administrator, developer, or end user.
A workspace can be associated with one or more schemas. You can add or remove schemas from a workspace after it is created.
You can create as many workspaces as you need in an APEX Service (APEX Application Development) instance. There is no limit on the number of workspaces per instance.
Verified References: Managing WorkspacesAbout Workspaces

Explanation
App Builder is the main interface of Oracle APEX that allows developers to create and manage web applications. App Builder provides various features and tools to design, develop, test, debug, deploy, and maintain applications. Some of the tasks that you can perform using App Builder are importing previously exported apps, creating new apps from scratch or from predefined templates or blueprints, editing app properties and attributes, adding pages and regions, creating shared components, running and debugging apps, exporting apps to files or workspaces, etc. You cannot create join queries using drag and drop or generate DDL statements from the Oracle data dictionary using App Builder. Verified References: [Using App Builder
- Oracle Help Center], [App Builder Concepts - Oracle Help Center]