Food couldn't reach the stomach without the esophagus and what

Chemical/ Mechanical Digestion

chewing will break down the food, which is mechanical digestion, as well as your saliva which downgrades the food with enzymes, which is your chemical digestion 

the aorta is the large artery leaving the heart branches into smaller arteries, which eventually branch into capillaries.the arteries carry oxygen and nutrients away from your heart, to your body's tissues. the capillaries are small, thin blood vessels that connect the arteries and the veins. the statement that arteries carry oxygen-rich blood to capillaries is true. veins on the other hand are blood vessels that take oxygen-poor blood back to the heart.

c would be the answer