. are the basic building blocks of living things—the smallest, most basic unit of structure and function.

Cells are the most basic and smallest things that make up living things

that is for living things

But if it is everything than it is an Atom

answer: i say it foxes

explanation:

you need to give us the answer options to for me to offical decide.

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.