The sun. But at the center of our galaxy (Milky Way) is a supermassive black hole called Sagittarius A- star
D. Rolling hills . Its usally Plateu but I gusse rolling hills would work too
D. Greenhouse gas feddback
I'm not for sure but I believe this is the answer sorry if I get it wrong in advance
This question. Is making a question out of a sentence. Here is a graph of the global temps over the millennia.