Question

why we feel extremely cool near waterfall from a mountain rather than the surrounding areas or region give reason​

Answer 1

we feel extremely cool near waterfalls be cause there is excessive humidity near them and the air evaporates causing a cooling effect.

Answer 2

This happens because as altitude increases, air becomes thinner and is less able to absorb and retain heat. The cooler the temperature the less evaporation there is, meaning that there is more moisture in the air. Air pressure decreases with altitude.