500 N is how much force that will be exerted to the cannon
<span>An environmental factor that causes a population to decrease is death</span>
Moth larvae eats leaves of the plant. It is an herbivore, a primary consumer in food chain. The primary consumer occupies the second trophic level in owl's ecosystem. The moth larvae in turn is eaten by small bird, a secondary consumer. Thus small bird occupies the third trophic level. Small bird is eaten by an owl, a top consumer that occupies fourth trophic level.
