Final answer:
The main mode of transmission for feline leukemia virus is shedding of the virus via saliva and shedding of the virus via feces.
Step-by-step explanation:
Main Mode of Transmission for Feline Leukemia Virus:
The main mode of transmission for feline leukemia virus is shedding of the virus via saliva. Infected cats can transmit the virus to other cats through close contact or sharing food and water bowls. The virus can also be transmitted through shedding of the virus via feces when cats use the same litter box.