If the population divided by the area is the average number of individuals per unit of area or volume, then what is the average number of individuals per unit of area or volume?

Answer choices:
- population divided by class
 - population divided by area
 - solid, liquid, gas
 - biological diversity
 - competing for resources
 - population divided by income
 - population divided by wealth
 - Something that makes plants green

 

  population divided by area        