You are presented with the question "What requires warmth to survive?" and the following answer choices: 
- opossums
 - vacuum
 - minerals
 - single-celled organisms
 - bullfrogs
 - female sex cells
 - dolphins
 - female connectors

Now knowing that an egg requires warmth to survive and eggs, the female sex cells, are produced in ovules, which are inside the ovary, choose the best answer.


 

      female sex cells   