Answer:
the Mediterranean Sea and the North Atlantic Ocean
According to the Scientific Method, in order to make a controlled experiment you NEED to have an hypothesis.
A controlled experiment consists of a test done by a scientist in which only one or a few variables are changed while the others remain constant in order to prove or disprove a hypothesis. This hypothesis is key to said experiment because it provides the starting point from which the professional can begin the procedure, as it helps focus on the subject that one is trying to get results from. Without a clear hypothesis, the outcome of the experimentation will not be valid nor specific.
The answer is variant B verb because it exprime an action made by the subject.
<span>It was on such an island in the third summer of its yellow green that we built our watch fire. Not in the thicket of dancing willow wands, but on the level terrace of fine sand which has been added that spring a little new bit of world beautifully ridged with ripple marks and strewn with the tiny skeletons of turtles and fish all as white and dry as if they had been expertly cured. We had been careful not to mar the freshness of the place although we often swam to it on summer evenings and lay on the sand to rest.</span>
