You need to give all the information. if a car is going 100 mph and a train is going 40 mph then the car will get there first. But you need to provide all the information in order to get a valid answer
I know that they are hunted with Whale oil
A) Cell wall (animal cells don't have these structures)
Scientists rely on embryological development patterns and adult body plans for all animals in order to classify animals. The correct option among all the options that are given in the question is the third option or option "c". It is the work of the biologists to classify animals and put them in order for studying them easily and in a group.