True or False: Protozoa, fungi, nematodes, and rotifers can reduce complex organic matter in wastewater.

The statement that protozoa, fungi, nematodes, and rotifers can reduce complex organic matter in wastewater is true. Therefore, the correct answer should reflect that these organisms collectively contribute to the breakdown of organic materials during the wastewater treatment process.

Protozoa play a significant role in consuming bacteria and organic matter, assisting in the clarification of wastewater. Fungi are also known for their ability to decompose organic matter, breaking down complex substances into simpler compounds. Nematodes and rotifers, while primarily involved in the microbial food web, can also contribute indirectly by influencing the activity of other microorganisms, which helps in the overall reduction of organic matter.

Choosing "False" overlooks the contributions of these various organisms in wastewater treatment, where they work together in complex ecological interactions to aid in the decomposition process.