Question

on a webpage, a ____ provides supplemental material such as social networking feeds and ads. a. header b. sidebar c. footer d. navigation bar

Explanation:

A sidebar on a webpage is typically used for supplemental material like social networking feeds and ads. A header is usually for the main title or logo area, a footer is at the bottom with copyright and other info, and a navigation bar is for site - wide navigation.

Answer:

B. sidebar