Solid-waste management and composting — Composting is a natural aerobic decomposition process that converts organic waste into stable manure (compost). To obtain faster and more uniform results, which organism is intentionally added in many improved composting setups (vermicomposting)?

Introduction / Context:
Composting is one of the oldest and most eco-friendly waste-to-resource technologies. It relies on diverse microbes (bacteria and fungi) and macro-organisms to break down kitchen scraps, garden waste, and farm residues into a nutrient-rich soil conditioner. Modern variants like vermicomposting deliberately introduce selected organisms to speed up the process and improve the quality of the finished compost.

Given Data / Assumptions:

• The goal is faster, more uniform composting and a friable, humus-like product.
• The options include common yard arthropods and vertebrates that might be found near compost bins.
• We are considering widely adopted best practices, not rare or specialized methods.

Concept / Approach:
Vermicomposting uses epigeic earthworms (for example, Eisenia fetida, also called red wigglers) that thrive in organic-rich surface layers. These worms fragment organic matter, stimulate microbial activity through gut passage, and produce worm castings rich in plant-available nutrients and biologically active compounds. Their constant burrowing enhances aeration and moisture distribution, both critical for aerobic decomposition.

Step-by-Step Solution:

Verification / Alternative check:
Extension manuals and urban waste guides repeatedly endorse vermicomposting as a rapid method producing stable, odor-free compost, particularly for kitchen waste management at household scale.

Why Other Options Are Wrong:

• Ants: may colonize dry piles, but they do not uniformly accelerate decomposition and can disturb the pile structure.
• Bugs (misc. insects): some assist in litter breakdown, but are not intentionally added as a proven, controllable method.
• Snakes: predators irrelevant to composting; potential safety hazard.

Common Pitfalls:
Over-wetting or overheating vermibeds, which drives worms away; always maintain moderate moisture (like a wrung-out sponge) and avoid direct sun or heavy rain on the bed.

Final Answer:
Worms