Which best describes a common relationship between air temperature and regions of high pressure and of low pressure?
a.
cool air rises, making the pressure above lower; warm air sinks, making the pressure above higher.
b.
cool air near the surface forms high pressure areas; warm air forms low pressure areas.
c.
high pressure areas warm the air around them; low pressure areas cool the air around them.
d.
dry air makes high pressure areas cooler; humid air makes low pressure areas warmer.