Why aren’t desert landscapes jagged and rocky?

Deserts landscapes are jagged and rocky due to high erosion rates and chemical weathering. The chemical weathering changes the physical character of the rocks which is the cause of it being jagged and rocky.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

c is the answer to this question. altitude affects the weather because air molecules evaporate.