You are presented with the question "What may vary in size as well as shape, but all are very small?" and the following answer choices: 
- keeping food fresh for long periods of time
 - disease-causing microorganisms
 - A solid geometric shape
 - Unequal radiation absorption
 - Small countries.
 - Shapewear.
 - A water well.
 - Basic units of the plant body.

Now knowing that cells vary in size as well as shape, but all cells are very small and basic unit of the plant body is the cell, choose the best answer.


 

        Basic units of the plant body. 