A farmer and a driver who is more important

a farmer because he produces good while food is a basic need

I would say a farmer is more important than a driver, because you don't need drivers for transportation, but you need a farmer for food.

Hope this helps; have a great day!

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).