Which animal is known for sucking blood and is classified in class C?

Leeches are indeed classified in class C, specifically within the phylum Annelida. They are known for their parasitic behavior, primarily their ability to suck blood from other animals, including humans. This feeding method involves the leeches attaching to their hosts using suckers and then using specialized saliva that contains anticoagulants to prevent blood clotting, allowing them to feed more efficiently.

While mosquitoes and ticks also feed on blood, they belong to different classes. Mosquitoes are part of the class Insecta, and ticks fall under the class Arachnida. Dragonflies, on the other hand, are also in the class Insecta and primarily consume other insects rather than blood. Thus, leeches are the most accurate answer due to their classification and clear association with blood-sucking behavior.