What is the scientific definition of energy that relates it to work?

The scientific definition of energy that relates it to work is the following: Energy is the capacity to do work. There are various forms of energy, of which work is one. It may manifest itself as mechanical energy. All forms of energy are associated with motion, it is transferred from one form to another.

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.