the rate at which they mature the number of reliable food sources the amount of maternal care per offspring the likelihood that some will survive and reproduce
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A female opossum can give birth to 5-15 offspring. What increases with a larger litter?
Possibilities:
- the rate at which they mature
- the number of reliable food sources
- the amount of maternal care per offspring
- the likelihood that some will survive and reproduce

the likelihood that some will survive and reproduce