Diagrams and illustrations are a. intended to show almost any type of geographical information b. used to present columns of numbers or survey statistics c. line drawings that indicate the features of something
answer fast

A. intended to show almost any type of geographical information

Explanation:

51. i'm

52 idk

53. just

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.