Question

which of the following sources should be examined in a study to determine the impact of a geologic source on levels of co₂ in the atmosphere? a photosynthesis b cellular respiration c decomposition d volcanoes

Explanation:

We are looking for a geologic source. Photosynthesis is a biological process that takes in CO₂. Cellular respiration is a biological process that releases CO₂. Decomposition is also a biological - related process. Volcanoes are geologic sources that can release CO₂ into the atmosphere.

Answer:

D. Volcanoes