They will need medical help.
Answer:
Hi! Your answer here is D. environmental factor. Being unable to play tennis due to extreme heat is an example of an environmental factor because the natural heat is preventing you from playing tennis. It is not a cost or equipment factor because it has nothing to do with either category. This is also not a personality factor because, though some people may naturally deal better with heat than others, that's influenced more by their location (example: California vs. Maine) than by their personality.
Answer:
Fast-twitch muscle fibers
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
