Question

the prevailing winds blowing from 30 degree South and 30 degree north towards the equator

Answer 1

answer is trade winds

Answer 2

With the coriolis force turns the wind to right in the part of the NH and to the area of the left and southern hemisphere.

Therefore the wind blows among equator and at the degree of 30 latitude are trade winds.

This winds found among 30 to 60 latitude blow from the west and called the prevailing westerlies in a fine manner.