Question: You are presented with the question "What are invaluable for soil health?" and the following answer choices:  - bacteria  - annelids  - sharks  - Exfoliation  - bioaerosols  - plankton  - evaporation  - sunlight  Now knowing that annelids are worms such as the familiar earthworm and earthworms are invaluble for soil health, choose the best answer.
Answer:
annelids