Can someone help me with this?

c

Explanation:

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

Covalent forces are intermolecular forces in which valence electrons are shared.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest

it's c. elements are placed in rows based on how may valencies electrons have.