The correct answer is D. An increase in the greenhouse effect
Step-by-step explanation:
Gases such as carbon dioxide in the atmosphere trap and reflect part of the radiation from the sun, this effect is known as the greenhouse effect. Additionally, the greenhouse effect causes part of the heat and radiation from the sun stays on the surface, which makes temperature warm. This means that an increase in carbon dioxide concentrations leads to more radiation and heat being trapped and reflected on the surface, and therefore there will be an increase in the greenhouse effect along with higher temperatures. Thus, the burning of fossil fuels and other activities that increase carbon dioxide in the atmosphere will most likely cause an increase in the greenhouse effect.