Question

http://prntscr.com/hi97r8

Answer 1

A. The scene may be taking place on a hot day, but the particular phrase "popping" and "to sting" does not refer to the hot day

B. Later in the excerpt, the turtles may be moving slowly, but in the part we are looking at for this question, "popping" does not describe "laziness" so B is not right either

C. Although it does have the word "to sting", the words coming before it includes "like" in the way that it is describing a simile and the grasshoppers as not actually looking "to sting" so there is no violence

D. popping like corn does describe the behavior of the grasshoppers

So by process of ellimination

you are correct