Scientists<span> use waves to </span>study<span> the different </span>layers of the earth<span>. Usually, they use seismic waves, which are waves generated by earthquakes or nuclear-test explosions. The seismic waves are bent, sped up, or slowed down, or even reflected when they pass through the </span>earth's layers<span>.</span>
Answer:
I'm pretty sure its South China sea, if not the Bay of Bengal.
Explanation:
The concept of government that the Americans insist on is: one-man-one-vote, that is that the votes of everyone should have the same value (this belief led to a number of reorganizations of voting district).