Question

sources of energy.....

Answer 1

4.sun , water, wind,waves
3. it must be non conventional.it must produce a large amount of energy.
2.mean that a source through which we get enough amount of energy

Answer 2

1)energy is ability to do work.
2)source of energy means which can be provide power for to do work.
3) it can do a large amount of work;energy is never destroy;it can be transferable.
4)sun;water;wind