The answer to this is Culture
The correct answer is option D. Calcium.
Low bone density can be due to a lack of calcium thus requiring supplementation.
Well, if you are able to put it in your own words, centuries back, when are ancestors were alive, we didn’t have things like McDonald’s. For a lot of people back then, they wouldn’t eat for a day or two then find a buffalo or something then eat it, and most of the time, they were running all day every day trying to find food. Getting lots of exercise. Nowadays, u can get into your car, and drive to A fast food place and get whatever u want. With no exercise.
The 3rd one exploring the positives and negative’s of each option your not supposed to explore the negative side