Which best describes a diagram of evolution? A. a straight line B. a crooked line C. a diagonal line D. a bush (explain how)

The best description would be a bush.

Explanation:

Evolution resembled a tree, with a trunk branching off into different branches, which branch off into smaller branches, etc. This is basically the same as a bush. Any kind of line that's just a line, without any branching out, doesn't properly represent evolution because it only follows one line of evolution instead of accounting for the full picture.