Physical characteristics of tropical rainforests: water

Write a short paragraph of about 150-300 words. explain how the physical environment can limit human activities.

Sandstones that form in aeolian (wind/desert) environments appear very different from other sandstones, such as those formed in a beach/ shoreline environment and in rivers on land. give three identifying properties for each of the three sandstones that would tell a geologist which depositional environment they formed in. consider things such as the relationship between transportation and grain size, shape, roundness, sorting, fossils and composition.

Can someone me? i need to have this done as soon as possible! i'm putting 20 points on this!