What has a nervous system?\nOptions:\n- (A) animals\n- (B) tortoises\n- (C) crocodiles\n- (D) sponges\n- (E) elephants\n- (F) placozoans\n- (G) mesozoans\n- (H) insects
Think hard. Detailed solution:
(H)
Most invertebrates have a nervous system.

Insects are the most common invertebrates.

Insects have a nervous system.

.

Thus, the answer is (H)