The answer is D, serving as a primary source of energy for the body.
I would probably drink a small amount of ocean water in 20 monute intervals, to not over dehydrate myself. This would probably give me enough time to go find other sources of water on the island (eg. coconuts) tp get clean water. In my opinion, this would be a better option than drinking contaminated fresh water. There is a higher risk of getting infected by the bacteria in the water, which would be why its better to take the contaminated fresh water only as a last resort option.
I'm not really sure what I just typed but hopefully it makes some kind of sense to you☺
<span>Vitalism is a belief that there is difference between living and noliving things. Living things are governed by different principles which are not applicable for nonliving things. The scientist now reject the vitalism since it lack scientific proof. It is considered only as spiritual. modern scientist believe life originated from non living things in the course of time.</span>