Please choose the correct answer to the question: Charisma has a goldfish she keeps in a tank. She planted several underwater plants in the bottom of the tank. How are the goldfish and the plants in the tank similar?

Answer1: Both add oxygen to the water. Answer2: Both perform photosynthesis. Answer3: Both are made up of cells. Answer4: Both eat food.

Answer format: answer1/answer2/answer3/answer4