Which of the following statements is most accurate? a.) warm air exerts more pressure on land than cold air b.) warm air is less dense than cold air c.) warm air is denser than cold air d.) warm air sinks

I would say B.  Ever hear the phrase, "warm air rises"?

El nino is a weather phenomenon caused when warm water from the western pacific ocean flows eastward. part1baan average of 7.7 hurricanes and 3.6 major hurricanes compares to 5 hurricanes and 1.5 major hurricanes from 1995-2005