The correct answer should be carbohydrates.
Carbohydrates are the main source of energy and without them the cells would have no energy at all, which is why they would start working based on reserves of fat, and if you didn't have that you would die of malnutrition.
Answer:
Ping pong, or table tennis, is played on a 5' by 9' surface.
I think it is housed in the Medulla Oblongata
