Here's why:

* Structure: Ammonia has one nitrogen atom (N) bonded to three hydrogen atoms (H).

* Bonding: Each bond between nitrogen and hydrogen is a single covalent bond, meaning they share one pair of electrons.

You can visualize this with a simple Lewis structure:

H

|

N - H

/

H

Let me know if you'd like more information about ammonia or covalent bonding!