Correct Answer: Virus

Solution : The correct option is - virus

Chickenpox is caused by the varicella-zoster virus (VZV), which is a member of the herpesvirus family. It is a highly contagious virus that spreads easily from person to person through respiratory droplets or direct contact with the rash of an infected individual. Once a person has had chickenpox, the virus can remain dormant in their body and reemerge later in life as shingles, a painful rash that typically affects one side of the body.