Explanation:

It is representing the work of a person ,like the work of a waiter is to serve people.A waiter is a person who "waits , takes orders and serve" on tables, often at a restaurant or cafe. A female waiter is called a waitress. They will take orders and delivers food to customers.Similarly in the same way the work of a mechanic is to repair things.A mechanic is an artisan, skilled tradesperson, or technician who uses tools to build, maintain, or repair machinery.Hence option 1 is the correct answer.