They built structures that helped keep shelter
Answer:
As of 2018, Europe has a total population of over 741 million people. Europe's population growth is comparatively low, and its median age comparatively high, in relation to the world's other continents, especially compared to Asia, Africa and Latin America.
Explanation:
<span>The baseball and the bat are colliding head-on in a relatively elastic situation; by contrast, crumpling cars are inelastic. In the example of a person catching a water balloon, the catcher is moving in the same direction as the balloon, thus reducing momentum change.</span>
I believe the answer is: <span>Submit his research proposal to each school's institutional review board (IRB).
Internal review board is an independent organization that established in order to determine the validity of a research and the ethical standard that used during the research. The standard that imposed by institutional review board usually would be aligned with the standard that written under the law.</span>
