Dome shaped muscle that separates the lungs from the abdomen is called

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

Ais a group of individuals of the same that exist together in the same place at the same time

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area