Because the higher you will go this colder it will get or depending which mountain you are aiming for just like Mount Everest.
The answer to this question is the Indus River. Hope that I could help!
The reason why the family removed an orchard of trees so they could build a house is because Erosion is likely because : C. Deforestation removes roots that hold the soil in place
Without plants' root , there is no medium that could hold the earth's structure to prevent it from moving
hope this helps