Spacer() and Divider() in SwiftUI.

 1. Purpose:

    - Spacer(): manages layout and spacing.

    - Divider(): visually separates sections.

2. Appearance:

    - Spacer(): invisible, takes up space.

    - Divider(): visible line.

3. Orientation:

    - Spacer(): horizontal or vertical.

    - Divider(): horizontal (default) or vertical.