I need help on the matter unit test please

Sure! What do you need help with specifically? Can you provide any specific questions that you are struggling with?

Which of the following is a way that populations of species are limited?

1) The population of a species cannot grow beyond a billion individuals before becoming overpopulated.
2) Populations are limited by how much food there is for them.
3) Populations are not limited naturally; without human influence, populations of species would grow
exponentially.
4) Population size is generally unpredictable.