The answer is: [C]:
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"the number of people who live in a square mile or kilometer" .
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Let us examine the other answer choices:
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Answer choice: [A]: "</span><span>an increase in the number of people living in an area over time" — refers to: "population growth".
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Answer choice: [B]: "<span>a decrease in the number of people living in an area over time" — refers to: "population decline"; or, "depopulation".
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Answer choice [D]: "</span>the number of live births per one thousand people in a year" — refers to: "birth rate". (as opposed to: "the number of deaths per one thousand in people in one year" — which refers to the "death rate"; or, "fatality rate").
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Answer:
Countries most likely create internal boundaries to: divide territory for administrative purposes.
B. Because nickel silicon and magnesium is not correlated to lava(magma) so there for b is your answer
<em>1</em><em>)</em><em> </em><em>option </em><em>D</em><em>)</em><em> </em><em>the </em><em>mid </em><em>twentieth</em><em> </em><em>century</em>
<em>2</em><em>)</em><em> </em><em> </em><em>option</em><em> </em><em>A</em><em>)</em><em> </em><em>fossil</em><em> fuels</em>
<em>3</em><em>)</em><em> </em><em>option</em><em> </em><em>A</em><em>)</em><em> </em><em>renewable</em><em> energy</em>
<em>4</em><em>)</em><em> </em><em>option</em><em> </em><em>B</em><em>)</em><em> </em><em>they </em><em>are </em><em>in </em><em>a </em><em>feature </em><em>of </em><em>Earth's</em><em> </em><em>natural</em><em> </em><em>weather </em><em>patterns </em><em>.</em>
<em><u>I </u></em><em><u>guess </u></em><em><u>this </u></em><em><u>might</u></em><em><u> </u></em><em><u>be </u></em><em><u>the </u></em><em><u>answers </u></em><em><u>.</u></em>