Answer:
D.Rocks and Sediments
Explanation:
Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. These are the reservoirs, or sinks, through which carbon cycles. The ocean is a giant carbon sink that absorbs carbon.
Answer:
Darwin's observations led him to wonder: How do species originate?
Explanation:
Darwin observed morphological traits and geographic distribution of many species as well as many fossils. From these observations the question: How do species originate?, arose. Darwin concludes that similar species must originate from a recent common ancestor with similar traits to all their descendants. This is the basis of the theory of evolution.