Does anyone know how to answer atleast one of these questions ? i dont understand any of it

Explain the relationship between forward and backward reactions in equilibrium, and predict how changing the amount of a reactant (creating a tension) will affect that relationship.

In 2002, the rare earth elements mine in mountain pass, california was closed because

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?