What occurs if the environment changes and a species is no longer able to survive?

answer; i believe that the correct answer is (light);

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

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?

links? do you have a link? i don't see anything?