Answer:
Yes, it is true that leaves use oxygen and sunlight to manufacture food. Plants have a special process called photosynthesis that helps them make their own food. During photosynthesis, leaves take in carbon dioxide from the air, water from the roots, and sunlight. Using these three things, leaves make oxygen as a waste product and also produce simple sugars that the plant uses for energy. This process is important for the plant's survival and also helps provide oxygen for other living things.