exert  

conform  

control 

explicitly 

according 

against 

belief   

habit

 incentive 

  a general rule, principle or piece of advice

a straight line

quotation from or reference to a book, paper, or author

 supervise (a person or work), especially in an official capacity.

make judgments about the quality of objects or events.

important

 unnecessary

needed

 necessary

in exactly

the same words as were used originally.

quotation from or reference to a book, paper, or author

a

general rule, principle or piece of advice

 interested in

independent on 

dependent on