What kind of behavior is shown in the Zwitter ionic form of amino acids?

Amphoteric behaviour

The correct answer is Option (2) → Amphoteric behaviour

Amino acids are water-soluble, high melting solids and behave like salts rather than simple amines or carboxylic acids. This behavior is due to the presence of both acidic (carboxyl group) and basic (amino group) groups in the same molecule. In aqueous solution, the carboxyl group can lose a proton and amino group can accept a proton, giving rise to a dipolar ion known as zwitter ion. This is neutral but contains both positive and negative charges. In zwitter ionic form, amino acids show amphoteric behaviour as they react both with acids and bases.