Here's why:
* -NH2 represents an amino group.
* Compounds containing amino groups are known as amines.
For example:
* Methylamine (CH3NH2) is a simple amine with a methyl group attached to the amino group.
* Aniline (C6H5NH2) is an aromatic amine with a phenyl group attached to the amino group.
Let me know if you have any other questions!