To be eligible to serve, you must be at least 25 years old, been a U.S citizen for the past seven years, and be an inhabitant of the state they represent (at election time).
Answer:I
If you mean by 21st century then, having awesome medical people
Explanation:
A lot of contries don't have a lot of medical staff, but the US has hired very good medical staff.
A food chain is 1 group of living things that eat other living things and get eaten. A food web is 2 or more food chains that connect.
