How dp you obtain data for factors influencing population distribution​

Ahill is made of rock particles of different sizes. which of these agents of erosion probably caused the hill to form?

What is a compass? how does it work

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.