You are presented with the question "What are factors in the creation of formations in the desert?" and the following answer choices: 
- scattered light
 - the pyramids
 - global warming
 - Physical weathering
 - salinity
 - tombs
 - Sahara
 - wind and erosion

Now knowing that sand dunes are formed by the wind transporting and depositing sand and aeolian erosion of sand in the desert is partially responsible for the formation of sand dunes, choose the best answer.


 

        wind and erosion 