Answer:
measuring seismic wave activity
Explanation:
the earths interior is made up of a number of layers such qs the crust, mantle, outer and inner cores.
A direct democracy is a system of government in which every citizen votes on every issue. The opposite of this is a representative democracy, in which the citizens vote for representatives who will then vote on issues on behalf of their constituents.
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The answer is option A "Neptune, Uranus, Saturn, and Jupiter" Outer planets are listed in this order also take a look at this link to see proof....
https://www.bing.com/images/search?view=detailV2&ccid=nOu5IiP0&id=BACBDA1F66AD96662D37A4871146D4DFE5...
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