The physical structure of the earths rock is changed by what

Physical structure of the earths rock is changed by mechanical weathering.

Explanation:

Mechanical weathering is the method of busting big stones into small ones. This method usually occurs near the facade of the planet. Temperature also influences the land. The cold nights and hot days regularly make things to swell and contract. That change can effect rocks to crack and split apart.

Mechanical weather is the correct answer