Using a stream analogy, resistance is most like
a. the flow of water.
b. rocks on a stream bed.
c. the slope of the land the stream flows over.
d. the final place the water goes after it's flowed downhill.

The flow of electricity can be likened to the flow of water in a stream. using this analogy, the flow of the water is the flow of electrons, the slope of the land is equivalent to the circuit voltage, the final place the water goes to is the positive terminal of a battery and electrical resistance is equivalent to rocks on the bed stream that impede water flow (answer b).