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]

Explanation
A drill down master detail form allows you to create a master detail form that contains two pages based on two related tables or views. The first page contains an interactive report for the master table. The second page features a standard form for the master and interactive grids for the detail. You can use the Create Page wizard to create a drill down master detail form. References: Creating Master Detail Forms and [Creating a Drill Down Master Detail Form]

Explanation
Automations are a sequential set of PL/SQL actions that are triggered by query results. They are used to monitor data and then perform the appropriate action2. Some use cases of automations are:
Monitoring log tables and raising an alert when there is an issue. For example, an automation can query a log table for any errors and send an email notification to the administrator if any errors are found2.
Approving specific requests. For example, an automation can query a table for any pending requests and approve them automatically based on some criteria2.
Sending email alerts at a particular time of the week. For example, an automation can query a table for any overdue tasks and send a reminder email to the assignees every Monday2.
Deleting a database record based on an end user's request is not a use case of automations, as it does not involve querying data and triggering actions based on the query results. This can be achieved by using a PL/SQL process or a dynamic action on the page where the user requests the deletion34.

Explanation
You can create a report in any of these three methods:
Create a report as a new page in an application by using the Create Page Wizard. This wizard guides you through the steps of selecting a page type, defining attributes, selecting a source (such as SQL query or table), and adding items or buttons.
Create a report when you create a new database application by using the Create Application Wizard.
This wizard allows you to generate one or more reports based on existing tables or views in your schema. You can also create a report and form on the same table or view.
Create a report region on a page in an application by using the Page Designer. This tool allows you to drag and drop a region type (such as Classic Report, Interactive Report, or Interactive Grid) onto the page and define its attributes and source.
The other option is incorrect because:
You cannot create a report from Object Browser. Object Browser is a tool that allows you to view and manage the database objects in your schema, such as tables, views, indexes, etc. You can only run SQL queries or scripts from this tool, not create reports.
Verified References: [Creating Database Applications] [Creating Pages] [Creating Regions] [Using Object Browser]

Explanation
A Static Content region type is used to display static text or HTML content on a page. To display messages about the employees of the month, you can use a Static Content region type with substitution variables that reference page items. Substitution variables are enclosed in ampersands (&) and can be used to dynamically replace text with values from page items or application items. The correct text to display the message is "Join me in congratulating &P1_ENAME, as the new employee of the month!" The other options are incorrect because they use either colons (:) or v() function, which are not valid ways to reference page items in Static Content regions. Verified References: [Creating Static Content Regions - Oracle Help Center], [Understanding Substitution Strings - Oracle Help Center]