What are two main forces that cause surface changes on earth?
a) erosion and plate tectonics
b) chemical and physical weathering
c) plate tectonics and weathering
d) weathering and erosion

The two main forces that cause surface changes on earth are d.) weathering and erosion.

The Answer would be ( D ) weathering and erosion.
Hope I helped 

Unique question.well, using science, you cannot create or destroy even if you do eat yourself so you would not grow twice as big, nor would you disappear. you would stay the same but change states potentially, or at least change your appearance (obviously).hope this . keep up these unique questions.