False! They are used in emergencies.
Answer: Internal influences may mean health hormones, as hormones are a key structure in how we function. An external influence could be sleep, as humans need sleep as a way to recharge, or diets as they have an effect on both hormones and physical durability
Answer:
Physically inactive people can lose as much as 3% to 5% of their muscle mass each decade after age 30.
Explanation:
Hopes this helps ?
I think C but I might be wrong
