The answer would be B. nucleic acids.
Elevation (it uses different colors to show the elevation of different places such as plains and mountains)
How would removing your umbrella in a rainstorm affect your ability to stay dry? The definition of a keystone species is a species that has a crucial role in an ecosystem. Removing one gear from a clock would stop the clock from working. Removing/changing a major contributer to a balance and natural ecosystem can potentially collapse the entire system altogether.
Answer:
Solar energy is used and made into chemical energy that is glucose used water and carbon dioxide (CO2) and also Oxygen (O2) is released as a output as well
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