What characteristic of carbon's structure makes it so important in building macromolecules? A. It is soluble in water

B. It is insoluble in water

C. It forms 4 strong bonds

D. It forms 2 weak bonds

C. It forms 4 strong bonds.

Though Carbon doesn't make the strongest bonds, the fact that it can make 4 bonds gives it the flexibility to make very complex molecules while the other virgin elements can only make 1, 2 or 3 bonds. Also the abundance of carbon also helps a lot.

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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