A student is proposing a model for the hydrologic/water cycle. The teacher asks that the student refine the model in order to more accurately reflect the amount of water in each of the types of reservoirs. Which revisions should be made to the model in order to more accurately reflect the amount of water in each reservoir? select all that apply.

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.