Yes and to make sure just check the comments
False, they are inexhaustible. If we were to use the resource as much as possible, it would exhaust and not be able to be used again.
Bivalves are protostomes, as they belong the to phyla Protostomia. They are freshwater/marine molluscs, whose body is covered by a protecting shell. They do not have a head, and some of their examples include oysters, clams, mussels etc.
B would be the most likely answer.