Final answer:
Housing social animals singly or frequently moving them to new places can increase the risk of respiratory diseases and infectious diseases.
Step-by-step explanation:
In the context of housing social animals singly or frequently moving them to new places, one of the factors that can be affected is respiratory diseases. An example of this is the spread of severe acute respiratory syndrome (SARS) from wild civet cats to humans through handling and consumption. Another factor that can be affected is infectious diseases. The increase in population density and proximity facilitates the transmission of diseases between animals and humans.