生态系统中的哪些因素会影响气候变化?

A. greenhouse gases

B. solar radiation

C. ocean currents

D. land use changes

Answer: A. Greenhouse gases

Explanation: Greenhouse gases, such as carbon dioxide, methane, and nitrous oxide, play a crucial role in regulating the Earth's climate by trapping heat in the atmosphere. When greenhouse gases increase in the atmosphere, they allow more heat to be retained, leading to a gradual rise in global temperatures.