Fact 1: Cells are the basic units of the structure and function of living things.

Fact 2: An organism is a living thing.

Given the two facts above, answer the question "What makes up the basic structure and function of all organisms found on Earth?" with the following options: 
- organs
 - cells
 - plants
 - fungi
 - bone structure
 - trees
 - Earth molecules
 - Fat


 

  cells       