Which of the following kingdom contains species that can convert ammonia to nitrite and nitrite to nitrate?

Monera kingdom contains species that can convert ammonia to nitrite and nitrite to nitrate.
Monera "single" is a biological kingdom that is made up of prokaryotes. As such, it is composed of single-celled organisms that lack a nucleus.
Nitrobacter plays an important role in the nitrogen cycle by oxidizing nitrite into nitrate in soil and marine systems. Nitrobacter uses energy from the oxidation of nitrite ions, NO₂^-, into nitrate ions, NO₃^-, to fulfill their energy needs. Nitrobacter fixes carbon dioxide via the Calvin cycle for its carbon requirements. Nitrobacter belongs to the Alphaproteobacteria class of the Pseudomonadota.