Fact 1: Earthworms are important deposit feeders that help form and enrich soil.

Fact 2: Deposit feeders ingest sediment and then extract the food.

Given the two facts above, answer the question "What do earthworms ingest in order to form and enrich soil?" with the following options: 
- segmented
 - vegetation
 - sediment
 - bacteria
 - Chlorophyll
 - sandworm
 - crawling
 - dirt


 

   sediment      