Answer:
A fasting diet because no calories are consumed
No they do not. Even if they did, they live in water so. Hope this helps!
No, it isn't. They are diseases.
Answer: Bone Mass/Density
Explanation: Resistance exercise can stimulate and activate bone cells to strengthen even build more bone mass. More technical hormones play a role too, but for simplicity strength training can slow bone loss or even rebuild bones.
I am not positive, but the answer is NOT, crossfit or elite fitness, sorry, hope this helps