Answer: Autotrophs
Step-by-step explanation:
Autotrophs:These are self feeders. Autotrophs may be classified as photoautotrophs and chemoautotrophs.
Photoautotrophs: Organisms which use light to make their food
Chemoautotrophs: Organisms which make their food from chemicals
Photoautotrophs include very small organisms such as prokaryotic Cyanobacteria,Plants,Algae e.t.c
Examples of Chemoautotrophs include Nitrosomonas sp. and Nitrobacter sp.