Fact 1: Shelter is used for protection by animals against weather.

Fact 2: Acid rain can be especially harmful to plants and animals.

Given the two facts above, answer the question "What protects creatures from harmful rain?" with the following options: 
- stars
 - Conifers
 - shelter
 - Frogs.
 - clouds
 - moon
 - Frogs
 - the skin


 

   shelter      