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

Fact 2: Tigers are the largest of the living cats.

Given the two facts above, answer the question "Cells are the basic units of the structure and function of what?" with the following options: 
- water
 - mammals
 - ice
 - tigers
 - animals
 - humans
 - plants
 - the Sun


 

    tigers     