A theme is a history surrounding it or a repeating moment, a period is a time that the themes were set in. hope this helps P
Jonas Salk<span> </span><span>was an American </span>medical researcher<span> and </span>virologist<span>. He discovered and developed one of the first successful </span>polio vaccines in the 1950's.
Hope I helped. :)
Section 1 of the United States Constitution, known as the "Full Faith and Credit Clause<span>", addresses the duties that </span>states <span>within the </span>United States<span> have to respect the "public acts, records, and judicial proceedings of every other state</span>
Answer:
A. Gravity
Explanation:
btw this is a science question I'm sure- hope this helps
