Identify the animal below that is not in the same class as the others.
crayfish
crabs
scorpions
lobsters

Option C

Explanation:

Crabs, lobsters and crayfish belong to the taxon Crustacean while scorpion is an Arachnid.

Crustacean (Arthropods) are aquatic & terrestrial free living species whose body is composed of segment and mainly comprise of three main parts i.e head , thorax and abdomen.  

They have a hard layer of exoskeleton that protects their body from external damage.  

Arachnids (arthropods) are aquatic and fresh water species with external skeleton, and joined appendages. They also have covering of exoskeleton

the answer is

c. parental

then that particular organisms become extinct.