Writers who use imagery
a. are using the sense to get audience to visualize
b. must describe either fire or water in great detail
c. rarely become considered "great" over time
d. usually do so because they do not like figurative language

The correct answer is A: Are using the sense to get audience to visualize.
Imagery is a form of writing in which the writer clearly describes a character, setting, etc. in order to help his audience picture the scene. 

Figurative language is not an alternative for imagery, and often times, both are used in literature. Although imagery can describe fire and water, it is not the only reason that imagery is used. In addition, many writers who use imagery can also become "great" and their works can become well-known.