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.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".