As rain mixes with chemicals such as sulfur dioxide in the air, acid rain is produced. this may result in
(a) lowering the ph in ponds, thus limiting the survival of many organisms
(b) lowering the ph in ponds, thus affecting water temperature
(c) raising the ph in ponds, thus encouraging the growth of organisms
(d) raising the ph in ponds, thus limiting animal development
(e) depleting atmospheric carbon dioxide available for photosynthesis