Fact 1: Sand dunes are formed by the wind transporting and depositing sand.

Fact 2: Sand dunes provide a habitat for several rare plant species.

Given the two facts above, answer the question "A habitat for several rare plant species is formed by the wind transporting and depositing what?" with the following options: 
- dirt
 - soils
 - coal
 - peat
 - rocks
 - crust
 - sand
 - earth


 

       sand  