Answer:
Circadian rhythm, or circadian clock, is an internal biological clock that regulates sleeping and feeding patterns, as well as a whole host of other biological functions in all living organisms. Organisms most active in the daytime are diurnal, humans included, whereas nocturnal organisms come alive at night.
After the first use of 'astronaut'
Microsoft is a company run by Bill Gates, a multi million dollar foundation.
Probability (b.) Newspapers<span />
