Affiliate Marketing Secrets

an earthworm lives and reproduces in the soil.though its feeding,secretion, and tunneling activities, the worm adds nutrients and allows air to enter the soil,together these statements describe the earthworms
A.Habitat
B.Nutrition
C,Niche
DEnvironment
I was gone the day we got this paper. please explain it to me so i understand the concept. thanks

In particular the feeding niche of a sea spider, a Waratah anemone, Green Algae and a tube worm?
Thankyou!!