how does competitions among businesses in private market help the consumers???????

Answer 1

competition on business is about increasing market share,
this can be done by a cheaper price, a higher quality, or an optimal mix of both, use cable TV for example, you might remember your cable not having all the channels that a family member had, and that was because cable companies had a monopoly on the market you lived in, now with satellite television your cable has probably add loads of channels to try and keep as much of its market share as possible

Answer 2

competitive pricing its a necessity to keep cost down