Answer:
The status of the elderly in the US hasn't changed that much compared to traditional societies because they both have lowered the status of the elderly in their societies. Lives are happier in modern society because people have medical care that they didn't have access to before
U need carbohydrates they give you energy
I think it’s the last one
Answer: You will have a NEGATIVE energy balance if you take in fewer calories than needed.
You need to consume the correct amount of calories in order to stay healthy or maintain a neutral energy balance, which is what’s best for you. Good luck.