Answer:
you could add an enzyme to speed up the reaction time and lower the amount of energy needed for the reaction
 
        
             
        
        
        
The correct answer is hydroxyl, isopropyl and a methyl groups. And menthol is a tri- substituted cyclohexane btw.
hope this helps if my answer is wrong let me know.
        
             
        
        
        
Lit is a lichen,a combination of an algae and a fungi