Select all that apply. what factors can limit growth?
a. competition
b. amount of sunlight or water
c. r-selected species
d. geographic borders

A, b and d

Competition for fix resources of course increases the energy expenditure needed to gather those resources and leaves less for a given population. A lower amount of sunlight or water also contributes to decreased energy which lowers growth. Finally, small borders limit growth in that population density can only go so high before the death rate increases beyond the birth rate.