A phrase that applies to covalent bonding and not other kinds of bonds is ...

Question

charge attraction.
great strength.
paired electrons.
electron-sharing.
All of the above.

Answer 1

The phrase that applies specifically to covalent bonding and not other kinds of bonds is "electron-sharing."

Covalent bonds involve the sharing of electron pairs between atoms, which distinguishes them from ionic bonds (which involve charge attraction) and metallic bonds. So, the correct answer is "electron-sharing."