What type of reaction is demonstrated by the process involving a carboxylic acid, an alcohol, and an acid that results in the formation of esters?

The below reaction is an example of

\(CH_{3}CH_{2}OH \ + \ CH_{3}COCl \xrightarrow[]{\textbf{Pyridine}} \)
\( CH_{3}COOC_{2}H_{5} \ + \ HCl\)

1. Acetylation

2. Benzoylation

3. Cross aldol condensation

4. Cross Cannizzaro reaction