Answer:
Clouds affect climate in two major ways. First, they are an essential part of the water cycle. Clouds provide an important link between the rain and snow, oceans and lakes, and plants and animals.
Secondly, clouds also have an important effect on Earth’s temperature. But it’s a bit complicated: Clouds can both cool down and warm up the temperatures on Earth.
Clouds can block light and heat from the Sun, making Earth’s temperature cooler. You’ve probably noticed this kind of cooldown on a cloudy day.
However, some heat from the Sun does get down to Earth. Clouds can trap that heat from the Sun. At night, when there’s no sunlight, clouds are still trapping heat. It’s sort of like clouds are wrapping Earth in a big, warm blanket.