How do both plants and animals fight pathogens a) energy is not given to the body b) blood is not moved in the body c ) carbon dioxide builds up in the body d) oxygen does not make it to the brain

d is

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

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with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence