```html

Activities vs. Fragments in Android Development

Activities and Fragments are key components in Android development that handle user interactions and form the building blocks of an app.

Activities:

An Activity represents a single screen with a user interface. It is a standalone component that typically corresponds to a single window in the UI.

Fragments:

Fragments are modular, reusable components that represent a portion of a user interface or behavior that can be added to an Activity. They help in creating flexible UI designs.

Focusing on the keyword "Android development":

When deciding between using Activities and Fragments in Android development, consider the following:

• Use Activities when you need a full user interface or screen. Each Activity has its lifecycle and is independent.
• Use Fragments when you want to create dynamic and flexible UI that can be added to different Activities. Fragments can be reused and provide better modularity.
• Fragments are particularly useful for creating multi-panel interfaces on larger devices or responsive designs.

It's important to choose the right component based on the specific requirements of your app to ensure efficient development and a better user experience.

```
This HTML answer covers the differences between Activities and Fragments in Android development, their use cases, and includes the focus keyword "Android development" for SEO optimization.