Answer :
Mussels are a type of mollusk found in intertidal zones known for their matching bivalve shells and the ability to attach to rocky substrates alongside species like sea urchins and starfish, hence the correct answer is 1) A type of mollusk found in intertidal zones .
These organisms are part of a group known as bivalves, which includes other species such as scallops and oysters. Mussels have two matching shells that encase their bodies and are particularly noted for their ability to clasp onto rocky substrates in the intertidal zone. This zone, which is the area between the high and low tide marks, is home to a variety of species, including sea urchins, mussel shells, and starfish. Intertidal zones can be found in numerous locations around the world, such as Kachemak Bay, Alaska, and Cornwall, England, where diverse marine life thrives, therefore the correct answer is 1) A type of mollusk found in intertidal zones .
