Final answer:
Cells infected with lytic animal viruses lyse because the virus disrupts necessary cell functions, leading to the death of the cell.
Step-by-step explanation:
Cells infected with animal viruses may lyse due to multiple factors, including the cytopathic effects of the virus, which can cause cell damage by altering normal cellular functions or directly leading to cell death. While some animal viruses, like HIV, leave the cell via budding without immediately causing lysis, others may induce lysis or apoptosis. In the case of lytic viruses, progeny virions can accumulate within the cell until a lysis signal leads to the release of all virions simultaneously, destroying the cell in the process.
Therefore, the correct answer to the question 'Cells infected with animal viruses lyse because' is option C) functions necessary for cell survival are not carried out and the cell dies. When a virus disrupts the host cell's usual activities, it can no longer maintain its homeostasis, leading to cell death and lysis.