As a result of the law of conservation of energy, a dolphin cannot gain more energy than it consumes. formulate an experiment to test this hypothesis using a dolphin living in a large enclosure. which method would best test this hypothesis?

measure the total energy in a dolphin, the aquarium, and the food fed to the dolphin. then measure the energy in the dolphin and the aquarium after feeding and determine the difference.
measure the total energy in a dolphin before feeding and the food fed to the dolphin. then measure the energy in the dolphin after feeding and determine the difference.
measure the total energy of the food before feeding and the total energy of the dolphin after feeding. then measure the energy in the aquarium after feeding and determine the difference.
measure the total energy in the aquarium before feeding and the food fed to the dolphin. then measure the energy in the aquarium after feeding and determine the difference.