Which os earths spheres contains mountains, valleys and other landscapes. plz im in the test now

Lithosphere is the region on the earth where, different types of landforms such as mountains and valleys are formed. It is comprised of silicate materials, and in addition to that different metals are also present. It is a part of the geosphere that constantly interacts with the atmosphere, biosphere and hydrosphere.

The various type of landforms that exist on the earth's surface, undergoes numerous changes and this changes are brought about by the weathering and erosion of the surface due to agents like wind, ice and water.

[content deleted] - user123802726recklesschicken

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's