Question

which group of words best helps the reader understand the meaning of the word cumulative in this sentence? many people consider global warming, also called climate change, to stem directly from the cumulative impact of air, land, and water pollution, as well as other human activities.

Explanation:

The sentence mentions global warming, climate change, and human - caused pollution. The word "cumulative" implies the combined or additive effect of air, land, and water pollution along with other human activities. The group of words "air, land, and water pollution" helps in understanding that these are the components that contribute cumulatively to the impact.

Answer:

air, land, and water pollution