Where does the water in lakes come from? select the three correct answers. a: ocean waves b: melting snow c: underground reservoirs d: surface-water runoff from rain

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

Are the layers of rock above and below the coal older or younger?

This connective tissue consists of large round densely packed cells with the nucleus pushed to one side.