Question

human influences on cycles
this is closely linked to climate change, as higher carbon dioxide concentrations contribute to global warming. consequently, human actions pose challenges to the stability of the carbon cycle and have broad environmental consequences.
what environmental consequence is closely associated with the disruption of the carbon cycle by human activities?
global cooling
ozone layer repair
climate change/global warming
increased biodiversity

Explanation:

The text clearly states that higher carbon dioxide concentrations (from human - related disruption of the carbon cycle) contribute to global warming, which is a major aspect of climate change. Global cooling is the opposite of what is described. Ozone layer repair is not related to the carbon - cycle disruption context here. Increased biodiversity is not indicated as a consequence of carbon - cycle disruption; rather, climate change (due to carbon - cycle disruption) often has negative impacts on biodiversity.

Answer:

C. climate change/global warming