I would say this is A. Head , hope this helps !
Answer:
Phytochemicals
Explanation:
Phytochemicals are chemical compounds produced by plants, generally to help them thrive or thwart competitors, predators, or pathogens. The name comes from Greek φυτόν (phyton), meaning 'plant'. Some phytochemicals have been used as poisons and others as traditional medicine.
Cipa is a rare fisorder of the nervous system which prevents certain sensation such as loss feelings and pain and also not being able to have sensations of pain
You get tired when you run because our leg muscles don't get enough oxygen anymore.
