Fact 1: Female monotremes lack a uterus and vagina.

Fact 2: Babies are normally delivered from the uterus through the vagina.

Given the two facts above, answer the question "Female monotremes lack ability to what?" with the following options: 
- allow growth
 - mate with females
 - lay eggs
 - produce offspring
 - deliver babies normally
 - swim in water
 - nest in burrows
 - decrease stamina


 

     deliver babies normally    