Goods where nonpayers can effectively be prevented from utilizing, but use does not reduce the benefit to other people are called: govt

The idea that a just government must imitative its powers from the approval of the people it governs. Constitutional democracy government that reinforce known limits on those who guide and acknowledge the voice of the people to be heard through free, fair, and relatively frequent elections. 

the correct answer is:

a population changes in response to a change in the environment.

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