What is the Resistance in a circuit in air at STP?

The resistance of a circuit is the total opposition offered to the flow of electric current.

A circuit that has resistances singly, in series, in parallel, or series parallel.

lowers the amt of electrical current flowing through it.

It slows down the current. Resistance has absolutely no effect on the 'speed' of the current. It simply limits its value.

It is the action of friction that slows something moving through air. The larger the object, the more the air resistance acting on the object.