I help you walk across the street
Police Officer
I teach you things you need to know
A teacher
I help you when you're hurt or sick
Doctor (or nurse)
I take you where you want to go
Bus Driver
I grow the food that people eat
Farmer
I help you when you don't feel well
Nurse (or doctor)
I come to put big fires out
fire fighter
I put the mail in your mailbox
Mail Carrier