I would say the correct answer is <span>C. There'sless apples in the garden today. The difference between "less" and "fewer" is very simple: less is used for uncountable nouns (the ones that can't be counted, e.g. you can't count love, hate, salt, etc.) and fewer for countable (such as apples). So, the correct version of this sentence would be: There are fewer apples in the garden today. </span>
It says that they are in the deepest part of the ocean. Humans lungs can only survive half of that or 1/4 we don't have enough oxygen to do that. So for that the answer is the first one.
