Y. Dawne, Content Blogger, Diploma in Journalism, Amsterdam, Netherlands
Answered Feb 07, 2019
The correct answer to this question is B. Infauna burrow into bottom sediments. Worms, clams and other infauna form their own communities that are connected to the water by tubes and tunnels. A healthy infaunal community contains many different species. A sediment-dwelling organism is a creature or micro-organism which lives mainly inside sediment – the layer of small particles at the bottom of a body of water.
These are collectively known as infauna, as opposed to epifauna – the benthic organisms which live on the surface of the sediment. A variety of organisms live in and disturb the sediment. The deepest burrowers are the ghost shrimps which go as deep as 3 metres into the sediment at the bottom of the ocean.