HELP! BRAINLIEST PLUS POINTS.
Images and captions are text features which often appear in articles. Writing in complete sentences, explain how images and captions can help you understand the main idea.

Images and captions may be simple add on text features, but they are very important. They can help you understand the main idea because often times visual representations can help a reader when trying to come up with a picture in their head of what the text is about. The general idea is that the pictures can help a reader see something more clearly. Pictures may also highlight some of the main ideas of the text, which helps the reader pay more attention the main idea instead of little details that may not be as important.

the rigid outer part of the earth, consisting of the crust and upper mantle is the lithosphere.     answer   crust and outer part of the mantle.