Apopulation of birds has a nesting site for 500 birds and if and food for 400 birds what is the limiting factor of the population? explain ur answer

Food because nesting site is large enough for a wider amount of birds while food is scarce in a sense and easier to diminish if not rationed correctlyi may be wrong but, i hope this !

Ibelieve the answer is relative humidity  because it makes more sense that way. solar flares usually occur in space it doesn't affect the earth, well it could but it wont make a significant damage.  latitude is land it doesnt do anything. prevailing winds, i dont know the correct meaning for this but i doubt that affects the land so it has to be relative humidity.