Please choose the correct answer to the question: How do the waxy stem covering and needle-shaped leaves improve the ability of a cactus to survive in the desert?

Answer1: They make the plant appetizing to small desert animals. Answer2: They prevent the loss of oxygen through photosynthesis. Answer3: They reduce the loss of water from the plant to the air. Answer4: They provide the storage space for different types of minerals.

Answer format: answer1/answer2/answer3/answer4