Answer
Condensation reaction.
$CH_{3}$$CH_{2}$$NH_{2}$ + $CH_{3}$$CH_{2}$$COOH$ --> $CH_{3}$$CH_{2}$$CONHCH_{2}$$CH_{3}$ + $H_{2}$$O$
Work Step by Step
Amines react with carboxylic acids to form proteins. A peptide bond $CONH$ is formed between the two.
$OH$ of carboxylic acid and $H$ of amine reacts to form water, and the remaining structure joins together. This is an example of a condensation reaction.
$CH_{3}$$CH_{2}$$NH_{2}$ + $CH_{3}$$CH_{2}$$COOH$ --> $CH_{3}$$CH_{2}$$CONHCH_{2}$$CH_{3}$ + $H_{2}$$O$
