You are presented with the question "What would prevent a protist from moving?" and the following answer choices: 
- If it's eating
 - layers of fat
 - Gravity
 - Greenhouse gases
 - Chemical energy
 - If it's alive
 - If it's wet
 - If it's dry

Now knowing that most protists have motility and motility is lost if the specimen dries, choose the best answer.


 

        If it's dry 