Basically physical and chemical weathering (do not confuse with erosion, which involves movement) contribute to the destruction of mineral forms. In this case it breaks down the rocks, minerals and soils, creating slopes and hills. It may be caused by (any form of) water, wind, gravity, waves or sunlight.
A convergent plate boundary is when two plates move towards each other, also known as a destructive plate boundary. So, the answer is A.
Tiananmen Square is in Beijing, China. Therefore the answer is 2, China.
hope this helps:D
