Select composting worms, which eat organic waste and produce castings (a product that fertilizes soil).
(Select; composting; worms, which eat organic waste and produce castings) (worms; eat; organic waste) (worms; produce; castings) (a product; fertilizes; soil)
Select worms worms a product
composting eat produce fertilizes
worms, which eat organic waste and produce castings
organic waste
castings
soil