Which is not a negative consequence of acid rain? a) damages plants and trees b) kills fish and amphibians c) gives soil a better ph for growing crops d) chemical weathering of buildings and concrete

The answer is C.
Many soil that is suitable for plant growth is around pH 5.5 to 7, therefore, if the acid rain makes the soil more acidic and promoting growth for plants, it is not a negative impacts. More crops leads to better economy for the place in some way.
However, the other options all brings damage to the environment, such as killing organisms, which can destroy the food chain, or corroding the buildings, which may threaten safety.