You are presented with the question "The fundamental units of life vary in size and shape but are all very what?" and the following answer choices: 
- elastic
 - large
 - dry
 - fat
 - visible to the naked eye
 - complex
 - small
 - matter

Now knowing that cells vary in size as well as shape, but all cells are very small and cells are the fundamental units of life, choose the best answer.


 

       small  