Correct the sentence fragments below

think that stone-age people how difficult life's. not the case. spent less time working then we do. food for only a small part of the day to obtain enough to eat. the rest of the time they rested. or visit friends.

or explain? ?

Think that Stone Age people have difficult lives? not sure if that's correct

This is not the case. you need to know what is not the case

They spend less time working than we do. Is lacking a subject.

They only got food for a small part of the day to obtain enough to eat. You could say that a few ways.

The rest of the time they rested or visited friends.