Why doesn't earth get hot enough to boil oceans and melt rocks from the radiant energy it absorbs from the sun?

Which of the following is an example of a policy that may be implemented by a business that has trouble with employees using the internet for their own personal needs? a. all employees will have to take a safety training class. b. employees caught using the internet for personal needs will have to take a professional development class. c. personal interviews will be conducted to find out who is using the internet for personal needs. d. employees will be monitored, but nothing will happen if their employer catches them using the internet for personal needs.

Can someone me with this plz? ! i'm putting 20 points on it!

The graph below plots the temperature and luminosity of stars on the main sequence.