The population pyramid shown represents a community that has been affected by human migration. A. Explain ONE economic reason why people under the age of 50 are unlikely to migrate to this community.

B. Describe ONE social pull factor that would draw migrants who are over age 65 over long distances to the location shown in the pyramid.

C. Explain ONE reason why the population for females aged over 80 can be a slightly larger group than the women aged 75 to 79 population.

D. Explain the degree to which the population pyramid shown can be used to predict local needs for social welfare services.

During metamorphic processes, increased pressure and temperature can affect the of minerals in rock. rocks subjected to very high pressure are typically than others because mineral grains are squeezed together, and the atoms are more closely packed. during metamorphic processes, water facilitates the transfer of ions between and within minerals, which can the rate at which metamorphic reactions take place. the growth of new minerals within a rock during metamorphism has been estimated to be about per million years. metamorphism is commonly associated with convergent plate boundaries, where two plates move toward each other. during contact metamorphism, a large intrusion will contain thermal energy and will cool much more slowly than a small one. metamorphosed sandstone is known as the metamorphic rock made from metamorphosed shale, was once used to make blackboards for classrooms