One of the most abiotic factor that may affect humans directly is waster availability because with out water we can get dehydrated and die.
It is surrounded by it's environment.
Answer:
A) The products of photosynthesis are the reactants of cellular
respiration.
Explanation:
Photosynthesis converts carbon dioxide and water into oxygen and glucose, so that cellular respiration converts oxygen and glucose into water and carbon dioxide.
The immune system, and the excretory system
(Honestly, all of them work to keep us 'healthy', but I believe these are the ones you're looking for)
Amount of food in stomach when drinking, body weight, rate of consumption, strength of alcohol.
