Which individual is acting most like a consumer

a person who hires a mechanic to fix their car

Explanation:

In business, consumers refer to the group of people who purchase either goods or services from another people,

Let's examine the options one by one

- a person whose job is selling goods at a market

Clearly the seller. This person does not purchase the goods. He/She sells it.

- a person who hires a mechanic to fix their car

This person is qualified as a consumer. He/she purchase a service from another person (the mechanic)

- a person eats a meal from vegetables grown in their garden

This person is qualified as a producer since he/she produce the vegetables, not purchasing it from other people

- a person sells their old television to a friend

Sam reason as the first option