What drives the process of plate tectonics? A. gravity
B. ocean currents
C. unequal heat distribution
D. earthquakes

As the human population grows, what happens to our natural-resource requirements? o they increase o they decrease o they do not change. they go in cycles

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

Explain why biological control methods are generally environmentally superior to chemical pest control methods.