Question

what is an effect of water pollution?
a. toxic metals build up in the food chain.
b. more floods occur along rivers and streams.
c. climate change increases water temperatures.
d. polluted water evaporates and becomes acid rain.

Explanation:

Water pollution can introduce toxic metals into water - bodies. These metals are then absorbed by aquatic organisms and can build up in the food chain through bio - magnification. Floods are mainly related to factors like heavy rainfall and poor drainage, climate change affects water temperature on a global scale due to greenhouse gas emissions, and acid rain is mainly caused by pollutants like sulfur dioxide and nitrogen oxides in the atmosphere, not directly by polluted water evaporation.

Answer:

A. Toxic metals build up in the food chain.