Fact 1: Hair is a fiber that is found only in mammals.

Fact 2: Mammals are animals that have hair, are warm-blooded, and nourish their young with milk.

Given the two facts above, answer the question "How to mammals nourish young?" with the following options: 
- nectar
 - organ
 - fur
 - H 2 O
 - solitude
 - milk
 - birth
 - ignorance


 

      milk   