The answer is b. viruses mutate from year to year
I say D would be the best answer for this question.
I think 1 but i'm not entirely sure sorry
Answer:
Strength Training
When you use your muscles, they become stronger. Strong muscles are also a plus because they support your joints and help prevent injuries. Muscle also use more energy than fat does, so building your muscles will help you burn more calories and maintain a healthy weight.
No I do not, I think that If you start to loose weight that you are becoming anorexic without the proper exercise and proper nutrition. Why, because without that your just feeding your body less and less stuff and its not the right stuff its like eating less or gorging yourself.