Evidence- If you find a lot of mouse bones in the pellet, you can estimate that the owl's main source of prey is mice. From the pellet, you can also tell that the owl is an apex predator, consumer, and carnivore. The pellet can also show where the owl lives because different prey lives in different areas.

Reasoning- This confirms that you can tell where the owl lives and what it hunts from the pellet because it contains clues from the owl's lifestyle and diet. Owls are important because they keep the rodent population down.