The Plantae kingdom is characterized by photosynthetic autotrophs, which produce their own food through photosynthesis.

All of the options listed (virus, bacteria, fungi) are considered living organisms in various contexts.

Hydra is a multicellular organism, while the others are unicellular.

Viruses are non-cellular entities that require a host cell to replicate.

Water is a non-living component of an ecosystem, while plants, animals, and bacteria are living components.

Water is a non-living component of the ecosystem, while plants, animals, and bacteria are living components.

Decay is not a characteristic of life; it is a process that occurs after death.

Inactivity is not a function of living organisms; they are characterized by metabolic activity.

Viruses are not considered living organisms as they cannot carry out metabolic processes on their own.

The kingdom Plantae includes organisms that are primarily autotrophic, meaning they produce their own food through photosynthesis.

The kingdom Protista includes unicellular organisms.

The organism level of organization is the highest, as it encompasses all systems and structures functioning together as a single living entity.

Carl Linnaeus is known as the father of taxonomy for developing the system of naming organisms using binomial nomenclature.