Which best describes the difference between digestion and cellular respiration? O A. Animals eat foods and digest as many nutrients as they can, before cellular respiration breaks down the waste materials to provide
energy for the body.
OB. Digestion breaks down food to release energy, so cellular respiration can produce additional energy for the body.
OC. Animals eat food molecules and digest them, and then the sugars from the food are broken down during respiration to provide
energy for the body.
D. Digestion allows for water absorption, and cellular respiration occurs to process the liquids released by digestion to provide energy
for the body.

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