The answer is B. The Dead Sea is located in the Middle East bordering Jordan Palestine and Israel. It 304 m deep and is the lowest point on land on the planet (−430 m below sea level). With 34.2% salt concentration it is 9 times greater than in oceans.
To the first question : cars driving along a highway is a major contributor to pollution.
the second question: using recycling center is one way we can conserve
Boating is mosly done in coastal regions. (unless you are rich and have a coast sized pool, that is different.)