Concept:Pox diseases in livestock are infectious conditions caused by a specific group of pathogens known as viruses.
Explanation:The term "pox" refers to a family of viral infections that affect animals such as cattle, sheep, goats, and poultry.
These viruses produce characteristic skin lesions, scabs, and sometimes fever in infected animals.
Bacteria, protozoa, and fungi cause other types of diseases, but not the classic pox diseases.
Therefore, from the given options, the correct causative agent is a virus.
Answer:The pox disease in livestock is caused by viruses.
Correct option: B. viruses