Final answer:
The term describing the coming together of various viral parts to produce new virions is a) assembly. Following the assembly, the virions can exit the host cell through budding, starting a new infection cycle.
Step-by-step explanation:
The various viral "parts" coming together to produce virions is described by the term a) assembly.
This process involves the assembly of viral components, including the viral genome and structural proteins, to form new virus particles, or virions.
Once assembled, these virions can leave the infected host cell via a process called budding, whereby they acquire their envelope from the host cell's plasma membrane.
The newly formed virions are then released and are ready to infect other cells, thereby initiating another round of infection.
The cycle of virus replication includes several steps: attachment, penetration, uncoating, replication, assembly, and release.