Which of the following is a method by which mosaic virus can be spread?

Mosaic viruses, which can severely impact plant health, are often spread through infected seeds. This method of transmission is particularly significant because seeds can carry the virus even before germination, allowing the pathogen to infect new plants as they grow. When infected seeds are planted, the emerging seedlings have a high likelihood of developing the mosaic disease, leading to widespread infection in the cultivated area.

While other methods of spread, such as through animals or wind, may exist for different plant pathogens, they are not the primary routes for the mosaic virus. For mosaic viruses specifically, the persistence in seed form is a critical factor in managing their spread, making the transmission through infected seeds the most concerning and direct method of spreading the disease within crops.