Fact 1: Plants use cellulose for their cell walls.

Fact 2: If the plant is green, it is a producer.

Given the two facts above, answer the question "What kind of organism use cellulose for their cell walls?" with the following options: 
- parasites
 - animals
 - Conifers
 - fungus
 - vegetation
 - producers
 - amoeba
 - viruses


 

      producers   