Name one basic characteristic for classifying organisms. If you are sure then only give the answer otherwise you can leave.​

The more basic characteristic for classifying organisms is the kind of cells they are made of because different organisms may share same habitat but may have entirely different form and structure.

I hope it's helpful for you...

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.