Question

what is fire and how its give heat and light

Answer 1

fire is caused by hydrogen . as the burning of fire give heat because it has heat energy and light energy
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Answer 2

Fire is a form of energy and it is renewable form of energy because we can produce fire again and again by traditional ways such as by rubbing two stones.As it is a form of energy so that "It can neither be created not be destroyed.

It gives us heat and light because of the following reason:-

When matter gets hot, there is greater motion of atoms within it.  This thermal motion causes an emission of thermal radiation.  When the matter gets hot enough, that emission will include visible light.  This is called incandescence.

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