I can’t help, can you explain what we should include in the essay and what we have to answer.
Answer: The role of an organism in the ecosystem is called its NICHE.
Explanation: The niche (pronounced 'neesh') of an organism is the specific function and purpose of the organism within its environment, ecosystem or food-web or food-chain.
Capillaries are the end structures in the artery system that bring oxygenated blood from your lungs to the rest of your body.
Through electrochemical processes
Jellyfish, Komodo dragon, & bacterium