Crustaceans and insects have what special structures?\nOptions:\n- (A) the eyes\n- (B) a cuticle\n- (C) internal\n- (D) excretory\n- (E) invisible\n- (F) Chlorophyll\n- (G) fur and fat\n- (H) muscled
Let's be accurate as possible and think first.
(D)
Some arthropods have special excretory structures.

Crustaceans are, like insects, arthropods.

Crustaceans and insects have special excretory structures.

.

Thus, the answer is (D)