Vermicomposting is a process of composting organic waste using worms. The correct answer is option 3, worms. Worms, specifically certain species of earthworms, play a crucial role in breaking down organic matter, such as kitchen scraps, garden waste, and livestock manure, into nutrient-rich compost. These earthworms are also known as red worms or red wigglers. Vermicomposting is a form of composting that takes place in a controlled environment, such as a worm bin or a vermicomposting system. The worms feed on the organic waste, digest it, and excrete nutrient-rich castings, also known as vermicompost. This vermicompost is highly beneficial for plants and can be used as a natural fertilizer to improve soil health and plant growth. It is important to note that while fungi, bacteria, and other microorganisms also play a role in the decomposition process, vermicomposting specifically relies on worms as the primary decomposers.