Let's think step by step! What systems are pollutants bad for?\nOptions:\n- (A) destroying life\n- (B) classification system\n- (C) an organism's body\n- (D) respiratory and circulatory\n- (E) animal habitats\n- (F) ambulatory systems\n- (G) social security system\n- (H) the environment
The thinking starts now:
User
Air pollution harms the respiratory and circulatory systems. Air pollution is caused by lots of different pollutants. Several different pollutants harm the respiratory and circulatory systems. The final answer: (D).
Assistant