Answer:
A) Covalent
Step-by-step explanation:
Elements are made up of atoms. In a molecule or compound, the atoms of same or different elements are held together by what is referred to as BONDS. Chemical bonds are of different types. One of them is called COVALENT BOND, which is characterized by the sharing of electron pairs between two atoms in a molecule or compound. The shared electron pairs is known as bonding pairs.
Covalent bonding occurs mostly between two non-metallic elements or between same elements in a molecule. Covalent bonding is brought about when two atoms with the same electronegativity try to fill their valence electron shell by sharing their electrons. Examples of molecules that exhibits Covalent bonding is H2O, where both hydrogen and oxygen atoms share their electrons.