2
The ware function
of
the particle is normalized. why?

Normalization of ψ(x,t): : is the probability density for finding the particle at point x, at time t. Because the particle must be found somewhere between x=-∞ and x=+∞ the wave. function must obey the normalization condition. Without this, the statistical interpretation would be meaningless.

Wind will blow from one direction to another.

Yes you are correct use the scientific method