It can honestly be all of the above ..
Answer:
The Pentagon is the headquarters building of the United States Department of Defense. As a symbol of the U.S. military, the phrase The Pentagon is also often used as a metonym for the Department of Defense and its leadership.
Explanation:
The exchange of oxygen, food, and waste between mother and fetus occur in the placenta.
Explanation:
It responds to big changes including changes in output from the sun, plate tectonic movements, and random asteroid impacts from space.
Freezer, refrigerator, ice
