What does our system of checks and balances prevent

The biggest component / ingredient of summer time smog is

2. explain the two different types of egyptian calendars. 3. what architectural advances did the ancient egyptians make? what impact do these advances have on our lives today? 4. what did egyptian art usually depict? how does this compare to forms of art that we see today? 5. what all was found in king tut’s tomb?

Why is it necessary to obey social norms? write briefly.