Answer: Producers
Explanation: Producers are autotroph, which means they make their own food, like plants.
The food sources available for a particular species in an ecosystem. Also space where they can live and reproduce, but food is the main factor.
Lipids are essential for all life on Earth. They play many important roles in maintaining the health of an organism. Arguably the most important function lipids perform is as the building blocks of cellular membranes. Other functions include energy storage, insulation, cellular communication and protection.