How did the indigenous people of Northern Mexico meet their need for food?

Which of the following statements is true? a. there is not enough food produced in the world to feed everyone. b. the biggest cause of hunger and malnutrition is the cost of getting food to people who need it most. c. most countries have enough arable land and resources to feed their own population and export a surplus d. malnourishment is only seen in a few countries with very limited food supplies.

What causes the cyclical changes in the appearance of the moon?

What is the difference between emigrate and immigrate? ?