Which of the following describes the proper order of structures that an oxygen molecule diffuses through after entering the lungs?

Atrial depolarization
Atrial repolarization
Ventricular depolarization
Ventricular repolarization

answer; i believe the answer is (polygenic inheritance;

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