Look at the diagram of the food web. A decrease in the number of willow trees will MOST LIKELY affect which organism in the
food chain?

D) snowshoe hare

Explanation:

This is because the snowshoe hare is the only one that eats from the willow tree in this food chain, but the number of snowshoe hares won't decrease because they can also eat from white spruce. So if the number of snowshoe hares won't decrease, then none of the other organisms will be affected.

(I attached the diagram of the food web.)

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.