B:Most countries produce just enough food for their people,and must import food from other countries.
<span>Europe is currently the third most populated continent with about 800,000,000 inhabitants. Europe's population growth rate has been decreasing due to recent trends and events, however, it is expected to increase though not soon. Anyways, Europe is not expected to reach the spot of the lowest populated continent, at least not in any time that is predictable.</span>
Correct answer choice is :
<h2>B) A metamorphic rock.</h2><h2 /><h3>Explanation:</h3><h3 />
A metamorphic rock is a consequence of a conversion of a pre-existing rock. The primary rock is reduced to very high heat and pressure, which produce distinct physical and chemical changes. Samples of these rock types comprise marble, slate, gneiss, schist.