You are presented with the question "What do some ovum require to survive?" and the following answer choices: 
- sperm
 - Proteins
 - glycogen
 - sugar
 - hormones
 - nutrients
 - warmth
 - food

Now knowing that an egg requires warmth to survive and and humans do come from eggs, eggs without shells, they are called ovum, choose the best answer.


 

       warmth  