Answer:
alluvial fan
Explanation:
Alluvial fans are a mix of sediments made up of mostly sand and gravel that are created when canyons, hills or mountains interact with flowing water. They help with the sustenance of life and irrigation farming as the main source of water.
Answer:
Rain shadow
Explanation:
A rainshadow is a portion of land which has been made to become a desert by mountain ranges which have made all plant growing and rainy weather to cease.
As air rises over the mountain ranges, there would be cooling of air, condensation of water vapor and also cloud formation. Land in the rain shadow is basically very dry.