Fact 1: Bird beaks are generally adapted for the food they eat.

Fact 2: Birds have a beak or a bill.

Given the two facts above, answer the question "What part of a bird's body is generally adapted to the kind of food that they eat?" with the following options: 
- bill
 - skin
 - growth
 - sugar
 - fat
 - H 2 O
 - organ
 - muscle


 

 bill        