Which term identifies a type of organic reaction?

(1) deposition (3) esterification

(2) distillation (4) sublimation

The answer is (3) esterification. Note that deposition, distillation and sublimation are not chemical changes, they are physical changes, so you can solve this question by elimination if you know that. Regarding sterification it is a well known chemical reaction that consists on the formation of esters from carboxilic acids.