The organism that causes elephantiasis belongs toA. InsectaB. ProtozoaC. NematodaD. Coelenterata

Elephantiasis, also known as lymphatic filariasis, is caused by parasitic worms. The organism responsible belongs to the phylum Nematoda. Specifically, the worms are part of the Filarioidea group, which includes species such as Wuchereria bancrofti, Brugia malayi, and Brugia timori.

These worms are transmitted to humans through the bite of infected mosquitoes, which are vectors for the disease. The larvae of the parasite migrate to the lymphatic system, where they cause inflammation and blockages, leading to the characteristic swelling of the limbs and other body parts.

Therefore, the correct answer is:

C. Nematoda