Please answer the following question by reasoning step-by-step.
What process provides one substance transported by the blood?\nOptions:\n- (A) breathing\n- (B) heat produced\n- (C) drink\n- (D) complex\n- (E) osmosis\n- (F) sweating\n- (G) cell division\n- (H) condensation

(A)
Oxygen is just one substance transported by the blood.

Breathing and circulation allow oxygen to be transported to the body's cells.

Breathing provides one substance transported by the blood.

.

So, the final answer is (A)