Answer:
It's not C or D because the Crust is actaully around 36km thick so that means it's eitehr A or B and the crust is mostly made form granite so Ima say B is the answer
B oxygen because they need it to survive
Answer:
Humans are gradually altering the climate and the earth's temperature through burning fossil fuels, destroying forests, and rearing animals.
Explanation:
This significantly increases the amount of greenhouse gases already present in the atmosphere, increasing the greenhouse effect and contributing to global warming.
Climate change is mostly caused by the greenhouse effect. Some gases in the Earth's atmosphere act as greenhouse glass, trapping heat from the sun and preventing it from escaping into space, causing global warming.
Hope it helps;
