Decomposers consume anything that is dead. That includes other decomposers.
The Earth would be filled with the things that decomposers decompose.
Things that are not bacterium or fungi.
To decompose means to break down. Decomposers break down organic materials.
Some things that are decomposers are mushrooms, millipedes, potato bugs (sow bugs,) ect. A decomposer is a living object that helps break down dead organisms.