How does the use of imagery help establish the setting of this poem

Imagery is a phrase that explain the 5 senses. Such as if you are in the movie theater, imagery can be smell popcorn, bright screen shining brightly towards your eyes, etc.

It gives vivid explanation of the setting and creates a visualization.

Explanation:

right angles are formed by perpendicular lines. if the lines would extend, to make two intersecting lines, they would form four right angles.

the answer is a.

explanation:

the clause "looking toward the south" modifies "a funnel cloud." it's not really the cloud that's "looking," but grammatically, that clause is modifying the cloud.