Fact 1: Aflashlight requires a source of electricity to produce light. Fact 2: Electrical energy is also energy. Given the two facts above, what requires a source of energy to produce light?

Choose your answer from: i. sunlight. ii. cactuses. iii. cakes. iv. pies. v. heterotrophs. vi. flashlights. vii. batteries. viii. most cephalopods.
Answer:
vi.