You are presented with the question "What increases in habitats from the poles to the equator?" and the following answer choices: 
- The number of individuals
 - sub-units of species
 - the Arctic
 - different organisms' numbers
 - ice
 - biological diversity
 - penguins
 - heat and light

Now knowing that biodiversity generally increases from the poles to the equator and biodiversity is equated with the number of different organisms present in a habitat , choose the best answer.


 

    different organisms' numbers     