C because my teacher gave me the answers
The respiratory system mainly consists of the lungs. The lungs give oxygen to the body, when you inhale air. They are responsible for removing carbon dioxide from the body. The circulatory system mainly consists of the heart. The heart pumps blood through the body, giving us oxygen. The heart is responsible for pumping blood and creating new blood cells. If we did not have a heart then there would be no blood, therefore, no oxygen. If you think about it, the body's oxygen transport system takes oxygen to the working muscles, through the circulatory and respiratory systems working together. The main workers are the heart, blood and lungs. The whole oxygen transport system works in a cycle.
So the five food groups are as follows:
Fruit group - apples, oranges, strawberries, cherries, etc.
Protein group - poultry ,fish, beef, and any other meat from animals you can think of.
Vegetable group - leek, kale, spinach, bell pepper, etc.
Grain group - different grains such as barley, wheat, rye, etc.
Dairy - milk and cheese for example.
Lower rates of anxiety, depression, higher self-esteem and greater empathy. Can also strengthen immune system, shorten disease and possibly even lengthen life.
