What does hierarchical society mean?

What would happen to kenya's pyramid if there was a rapid decline in its: a) birth rate b) death rate

It is reasonable to assume that nations with a low total fertility rate (tfr) and a modest amount of population growth are in

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.