Fact 1: Feathers help birds fly and provide insulation.

Fact 2: Birds have bodies covered with feathers.

Given the two facts above, answer the question "What is one reason birds have covered bodies?" with the following options: 
- To help them burrow
 - They have thick fur
 - layers of fat
 - To help them fly
 - To keep their body heat.
 - To attract predators
 - with their fur
 - To make them heavier


 

    To help them fly     