What is caused by acid deposition? 

A)  better preserved statues, buildings, and car finishes 
B)  neutralized water in lakes low in limestone 
C)  decreased mobility of toxic metals 
D)  many species of fish are killed

Acid Deposition

The deposition of acidic components in rain, snow, or dry particles on the earth's surface, often originating from the emissions of sulfur dioxide and nitrogen oxides.

Toxic Metals

Refers to metallic elements that have high densities, atomic weights, or atomic numbers and are toxic to organisms at low concentrations.

Fish

Aquatic animals with gills, often scaled, that live in water, ranging from tiny minnows to large sharks, important for food, recreation, and ecosystem health.