The correct answer is: A. Producing compost manure.
Vermi-composting is a process of using worms to convert organic waste into a valuable soil amendment known as worm castings or vermicast. Worm castings are rich in nutrients and beneficial microorganisms that can improve soil structure and fertility. They are also a safe and effective way to manage organic waste.
Option B is incorrect because vermic-composting does not produce worms. In fact, it requires worms to be successful.
Option C is incorrect because vermic-composting is a way to manage waste, not create it.
Option D is incorrect because vermic-composting is a way to use worms to benefit the environment, not destroy them.