Billy is sitting in a chair in class. if the action force is the downward push of his weight on the chair, what is the reaction force?

the upward force of the chair pushing on billy

you're very welcome

Explanation: whens their's an downwards force, their's always an opposite

a) cold, dry

explanation:

continental polar masses are cold and dry air masses because the cold air cannot hold much moisture. as they move into warmer air, they can trigger precipitation.