Questions:

1. For a block kept on a FRICTIONLESS FIXED INCLINE the acceleration down the plane is g\*sin(A) (A is the angle of inclination) this acceleration can be further said to have components in the horizontal direction. But since gravity is only acting vertically downwards how can it cause an acceleration in the horizontal direction. Is the Normal from the surface of the incline the reason behind it. If so how?
2. Is it okay to take components of a force, find the acceleration in the direction of that component and then further take components of the said acceleration.