Final answer:
Animal viruses can exit their host cell by the process of budding, which involves individual virions leaving the host cell enveloped in a piece of the cell's plasma membrane.
Step-by-step explanation:
In addition to lysis, which is one way that viruses can exit and destroy host cells, animal viruses may also exit the host cell by budding. This process allows virions, the complete virus particles, to leave the host cell individually without causing immediate cell death. During budding, a piece of the host cell's plasma membrane envelops the virion, allowing it to exit the cell.
While budding allows the virus to leave the cell without immediate destruction, it typically results in damage and may eventually lead to the dysfunction and death of the host cell. Other mechanisms such as fusion, fission, and extrusion are not correct in this context.