To what phylum do roundworms belong

Which could be a pathway of food through an ecosystem

Asap many people try to eliminate fat from their diets which is one reason it is necessary for humans to eat fat a) fat is the only way to get energy b) every cell in the body must contain fat c)fat stores less energy than polysaccharides d) saturated fats make blood vessels healthier

On his trip to the galapagos islands, darwin determined that animals on the islands