Here's why:

* Number of shared electrons: A triple bond involves the sharing of three pairs of electrons (six electrons total) between two atoms.

* Electron density: This creates a higher electron density between the two atoms, leading to a stronger electrostatic attraction.

* Bond length: Triple bonds are shorter than single or double bonds due to the stronger attraction, further contributing to their strength.

Example: The triple bond in nitrogen gas (N≡N) is very strong, making nitrogen a relatively inert gas.

In summary, the strength of a covalent bond increases with the number of shared electron pairs.