Question

single
double
triple
quadruple

Explanation:

In the given methane ($CH_4$) structure, each bond between carbon (C) and hydrogen (H) is a single - covalent bond. A single bond is formed when two atoms share one pair of electrons. In methane, carbon has 4 valence electrons and hydrogen has 1 valence electron. Carbon shares one electron with each of the 4 hydrogen atoms to achieve a stable octet (for carbon) and a duet (for hydrogen). There are no double, triple, or quadruple bonds in methane.

Answer:

single