Final answer:
The question pertains to the life cycle of animal viruses, including key stages such as biosynthesis of viral components, assembly, and release, which lead to the formation and spread of new virions after infecting and often destroying the host cell.
Step-by-step explanation:
The life cycle of viruses that infect animal hosts involves several key stages: attachment, penetration, biosynthesis of viral components, assembly, and release. During the biosynthesis stage, after the virus has penetrated the host cell, it takes over the host cell's machinery to produce viral components such as proteins and copies of its genome. Following this, assembly of the newly made viral proteins occurs to form new virus particles, known as virions. Finally, the release stage sees the new virions exiting the host cell, which often results in the destruction of the host cell. In the case of enveloped viruses, such as the influenza virus, the release may occur through a process called budding, where the virus acquires a piece of the host cell's plasma membrane as it exits the cell.