Which of the following is true about animals? A. All animals are single-celled. B. All animals have complex organ systems. C. All animals are consumers. D. All animals are producers.

All animals have complex organ systems or  All animals are consumers.

Explanation:

i believe the answer is a or 1

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