- Food contains nutrients for living things
- Dead organisms are the source of nutrients for decomposers
- Hence, dead organisms are the source of food for decomposers

- Dead organisms are the source of food for decomposers
- If an object is a source of something for something else then that something else can obtain that something from that object
- Hence, decomposers obtain food from dead organisms

- Decomposers obtain food from dead organisms
- Absorbing something is a kind of method for obtaining something
- So, decomposers obtain food by abosorbing food from dead organisms

Hence, decomposers obtain food by abosorbing food from dead organisms
Question: How do decomposers obtain their food?
Context: - Food contains nutrients for living things 
- If an object is a source of something for something else then that something else can obtain that something from that object 
- Dead organisms are the source of nutrients for decomposers 
- Absorbing something is a kind of method for obtaining something