Answer:
I think it's the first and the second ... but I'm not sure
1. Energy from the sun is transferred to earth's surface. Some of that energy is then transferred to the air above the surface.
2. The closer a location is to the equator the more energy it receives from the sun. Therefore a location's air temperature is affected by its distance from the equator.
3. An effect my have more than one cause. These may be linked into a chain of effects and causes.
Answer:
The populations of different artic animals would start to decrease because of the lack of land and food.
I think calcium but i could be wrong