<span>These are viroids. They are some of the smallest types of matter that have been shown to take on the properties of living beings. They have the ability to replicate, while not having many of the mechanisms that are commonly found in DNA and required for them to replicate.</span>
Incomplete question you must include the choices.
nervous system is the communication system of the body.
Habitat destruction is the cause of the loss of species because the organism have been deprived of their living requirements.