What are the different types of air cleaners?

The correct choice identifies three distinct categories of air cleaners: media, electronic, and agglomerators.

Media air cleaners operate through physical filtration mechanisms, using materials like fibrous media to capture particles from the air. This type includes various filters such as HEPA and pleated filters.

Electronic air cleaners utilize electrical charge to attract and trap particles. These can include devices like electrostatic precipitators, which are effective in removing smaller particulate matter.

Agglomerators work by encouraging the grouping or clumping together of smaller particles into larger ones, which can then be more easily collected or filtered out. This process often enhances the efficiency of other filtration mechanisms by increasing the size of particles that need to be removed from the air.

The other options, while including terms related to air cleaning technology, do not encompass the varied types of air cleaners in a comprehensive manner. For instance, hydrogen peroxide and ozone might be used in some cleaning processes but don't classify as standalone types of air cleaners. Similarly, mechanical, passive, active, and chemical might describe functionalities or classifications of systems but are not widely recognized as distinct types of air cleaners. The mention of filtration, absorption, scrubbing, and circulation all describe methods or mechanisms rather than defining specific types of air cleaners themselves.