Question

which of the following ecosystems is a major carbon sink. select one: a. rain - forests b. rivers c. tundra d. sewage treatment plants

Explanation:

Rain - forests have a large number of plants that absorb carbon dioxide through photosynthesis, making them major carbon sinks. Rivers mainly transport water and sediments, tundra has limited vegetation and slow carbon - sequestration rates compared to rain - forests, and sewage treatment plants are mainly for treating waste water, not significant carbon sinks.

Answer:

A. rain - forests