Use reasoning to lead to the answer of the following question:
Amphibians have what sort of sensing system?\nOptions:\n- (A) strong\n- (B) retina\n- (C) four limbs\n- (D) chemical\n- (E) mechanical\n- (F) the eyes\n- (G) nerves\n- (H) heat or cold

(D)
Amphibians have sense organs to smell and taste chemicals.

Smell and taste belong to our chemical sensing system.

Amphibians have a chemical sensing system.

.

So, the final answer is (D)