According to our textbook, a biotic factor

According to our textbook, a biotic factor is a living element found within an ecosystem, while an abiotic factor is a nonliving element found within an ecosystem. Choose a biome and ecosystem and provide an example of a biotic and abiotic factor found within your biome/ecosystem. Explain the importance of these factors to your specific biome/ecosystem.

This is for BIO-220, Environmental Science with the textbook Environmental Science: The Human Impact on Natural Resources.