The oxygen which is released into the air by a plant originates from: the release from carbohydrate decomposition from co2 gas splitting of water molecules protein synthesis

splitting of water molecules

Explanation:

the answer is trees if i'm not mistaken

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls