Question

write five main sources of heat

Answer 1

the five main sources of heat are:
1.our body contain heat
2.sun gives heat
3.heat from fuels
4.heat from electricity
5.by rubbing things

Answer 2

the five main sources of heat are

1)sun
2)radiations
3)due to friction (when the body is rubbed with the ther etc)
4)whenever there is an explosion
5)heat waves