Question

Which statement best explains why carbon is present in so many kinds of molecules? (Points : 1)

It is rare on earth.

It can form four covalent bonds.

It has no valence electrons.

It can become an ion

Answer 1

The answer is "It can form four covalent bonds."

Answer 2

The statement which best explains why carbon is present in so many kinds of molecules is because it can form four covalent bonds.
It isn't rare on Earth, so A is incorrect. It has valence electrons, so C is incorrect. It cannot become an ion, so D is incorrect.