I would go with C) food because food gives us energy, healthy veggies gives us energy and unhealthy junk food really doesn't give us as much energy and makes us fat. Not air because air is the need for life, not energy and not a place to live since that really doesn't give us energy.
That is because all meridians start and end at the same point, unlike parallels that are parallel. Meridians all start at the north pole and go towards the south. Therefore, all of them meet at that point that is the north pole, so the distance between all of them is 0 miles.
