I wanna say D.
Sorry if I’m wrong:(
Answer: I'd say education and social/cultural things.
Explanation: Most people come here for cultural, education and freedom.
If we have the intersection of the equator and the prime meridian as a starting point, and we move towards west, than the three oceans that we will encounter will be in the next order:
1. Atlantic Ocean; lies between Europe and Africa from one side (eastern borders), and North and South America on the other side (western borders). It is in fact our starting point.
2. Pacific Ocean; lies between Asia and Australia form one side (western borders), and North and South America from the other side (eastern borders).
3. Indian Ocean; lies between Southeast Asia and Australia (as its eastern borders) and Africa as its western border, and on the north it borders with South Asia.
The northernmost ocean on our planet is the Arctic Ocean, which is lying around the Arctic circle.
The southernmost ocean is the Southern Ocean which surrounds Antarctica with its waters.
<span>True, however 50% is rather optimistic value, it's probobally more. The main source of water is in the ground and the groundwater gets constantly more contaminated with road salt, oil, gasoline and other chemicals (and as you can see, these are all manmade products).</span>
