Solar power is the answer
A membrane that allows only some materials to move in and out of the cell is B. Semipermeable.
<h2><em><u>A </u></em><em><u>system</u></em><em><u> </u></em><em><u>that</u></em><em><u> </u></em><em><u>provides</u></em><em><u> </u></em><em><u>structural</u></em><em><u> </u></em><em><u>strength</u></em><em><u> </u></em><em><u>and</u></em><em><u> </u></em><em><u>support </u></em><em><u>and </u></em><em><u>forms </u></em><em><u>the </u></em><em><u>framework</u></em><em><u> </u></em><em><u>of</u></em><em><u> </u></em><em><u>our</u></em><em><u> </u></em><em><u>body </u></em><em><u>is </u></em><em><u>known </u></em><em><u>as </u></em><em><u>skeletal</u></em><em><u> </u></em><em><u>system</u></em><em><u>.</u></em></h2>
One difference that scientists noticed in parts of the Zion National Park that had higher species diversity compared with regions with lower species diversity was that area with lower diversity had much higher rates of erosion. The correct answer is A.
