Question

the two most important things that humans receive from plants are ______.
a. medicine and food
b. food and clothing
c. oxygen and food
d. shade and food

Explanation:

Plants perform photosynthesis, producing oxygen (essential for respiration) and many plants are a source of food (directly or indirectly). Medicine, clothing, and shade are either less fundamental or not as universally critical as oxygen and food from plants. So the two most important things humans receive from plants are oxygen and food.

Answer:

c. oxygen and food