Question

4 deforestation is an example of a human activity that affects the carbon cycle. how does cutting down trees affect this cycle? a increases the level of oxygen b increases the level of carbon dioxide c increases the levels of oxygen and carbon dioxide d it will not affect the carbon cycle

Explanation:

Trees absorb carbon dioxide (\(CO_2\)) during photosynthesis. When they are cut down, there are fewer trees to perform this function. Also, if the trees are burned or decompose, the carbon stored in them is released as \(CO_2\) into the atmosphere. Oxygen (\(O_2\)) is a product of photosynthesis. Fewer trees mean less \(O_2\) production, so options A and C are incorrect. Since deforestation impacts \(CO_2\) levels, option D is wrong.

Answer:

B. Increases the level of carbon dioxide