Population density is the average number of individuals per unit of area or volume, and another measure of growth is population density. Given these facts, what is is the average number of individuals per unit of area or volume among the following options:
- solid, liquid, gas
 - Earth orbiting the Sun
 - competing for resources
 - measure of growth
 - more abundant
 - it keeps an organism warm
 - fur and fat
 - competition


 

    measure of growth     