The answer is #4. The first and second one involve acid, which is chemical weathering. The third one involves oxidation, which is a chemical process. The only mechanical process is option four.
        
             
        
        
        
(D) It is caused by rhinovirus.
 
        
             
        
        
        
An example of a person is not a bad guy and I don’t want him going back
        
             
        
        
        
Answer: If it comes closer, make yourself look larger and make lots of noise. If it still continues to come closer then spray (or throw) water at it. A raccoon that is too aggressive or too tame may be sick or injured.