Which of the following best explains why Mars' and Venus' surface temperatures vary, despite both planets having atmospheres that contain mostly carbon dioxide? A. Mars has a thin atmosphere that cannot hold much heat.

B. Mars has a surface of red rocks and sand which reflect heat.

C. Venus has a surface of high mountains which absorb heat.

D. Venus has a thick atmosphere which blocks heat from the surface.

(04.05 hc) analyze the given diagram of the carbon cycle below. part 1: which compound does c represent? part 2: name a process that could release this compound into the air. part 3: explain how the elements that form it are conserved during the carbon cycle. use complete sentences to explain your answer. justify how this compound was created from a recycling of carbon in the carbon cycle. use complete sentences to explain your answer.