Here's why:

* Covalent bonds involve the sharing of electrons between atoms.

* In water, the oxygen atom shares one electron with each of the two hydrogen atoms. This sharing creates a stable molecule.

It's important to note that while the individual bonds within a water molecule are covalent, water molecules themselves are attracted to each other through hydrogen bonds. These are a type of intermolecular force that plays a crucial role in water's unique properties, such as its high boiling point and surface tension.