In this paragraph, the sentence: “The channel of spines on their backs catches rainwater and channels it to their mouths,” is _____?

Horned lizards are well adapted to their environment. They have evolved body features for surviving in sandy and dry areas. The channel of spines on their backs catches rainwater and channels it to their mouths. Their wide, flat bodies allow them to move easily across the sand without sinking in.

A. a restatement

B. a topic sentence

C. an illustration