Describe how the exchange of food left a lasting imprint in the americas and europe

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 is a small water source like a stream or brook?

Can someone me with this plz? ! i'm putting 20 points on it!