Baculoviruses are pathogens that attack:

The correct option is Insects.

Baculoviruses are a family of rod-shaped, double-stranded DNA viruses (belonging to the family Baculoviridae) that are well-known pathogens primarily attacking insects and other arthropods.
These viruses are highly host-specific, typically infecting only a narrow range of closely related insect species, and they do not affect vertebrates (such as birds) or other invertebrates like roundworms and molluscs.

Due to their high specificity and safety towards non-target organisms, baculoviruses are extensively used as biological control agents (biopesticides) in agricultural and forestry management to control pest populations without harming beneficial insects, plants, or mammals.