Final Answer:
Many animal viruses are zoonotic, which comes from the host's animals and can be transmitted to humans. Thus, the correct option is zoonotic, animals.
Step-by-step explanation:
Zoonotic viruses, constituting the majority of emerging infectious diseases, demonstrate the ability to jump from animals to humans. This phenomenon is a result of the viruses adapting to new hosts, a process known as spillover. The term "zoonotic" encapsulates the transmission of viruses from animals to humans, reflecting the interconnectedness of ecosystems and the potential consequences of this interaction. The source of these viruses is often an animal reservoir, where the virus resides and circulates without causing significant harm to the host species.
Understanding the dynamics of zoonotic transmission is crucial for mitigating the risk of pandemics. The proximity and increased interaction between humans and wildlife, whether through agriculture, deforestation, or urbanization, create opportunities for viruses to make the jump. This transfer is not exclusive to any particular group of viruses, encompassing various families like coronaviruses and influenza viruses.
The complex interplay between human activities, environmental changes, and the adaptability of viruses underscores the importance of a multidisciplinary approach to monitoring and controlling zoonotic diseases.