Question

question: which of the following is a popular css framework primarily used for building responsive designs?
○ backbone.js
○ bootstrap
○ gatsby
○ redux
○ node.js

Explanation:

To determine the correct answer, we analyze each option:

• Backbone.js: A JavaScript framework for structuring web apps, not a CSS framework.
• Bootstrap: A well - known CSS (and JavaScript) framework used for creating responsive web designs. It provides pre - built CSS classes for grid systems, responsive utilities, etc.
• Gatsby: A static site generator for React, not a CSS framework.
• Redux: A state management library for JavaScript apps, not a CSS framework.
• Node.js: A JavaScript runtime environment, not a CSS framework.

Answer:

B. Bootstrap