You are presented with the question "What do earthworms ingest in order to form and enrich soil?" and the following answer choices: 
- segmented
 - vegetation
 - sediment
 - bacteria
 - Chlorophyll
 - sandworm
 - crawling
 - dirt

Now knowing that earthworms are important deposit feeders that help form and enrich soil and deposit feeders ingest sediment and then extract the food, choose the best answer.


 

   sediment      