You are presented with the question "having what is a cause of mortality" and the following answer choices: 
- natural predators
 - seasons
 - Abnormal cell growth
 - liver cancer
 - insects
 - chickenpox
 - influenza
 - sunlight

Now knowing that having no natural predators increases population size and population size is a function of natality and mortality, choose the best answer.


 

 natural predators        