In The Pros and Cons of Plastics, explore how the economy (the way materials are made, sold, and bought) is affected by using and producing plastics. Use the information to answer the question. How does producing plastics benefit the economy?

Plastic helps by employing people, storage uses, demand by public , cons would be when thrown out its terrible for the environment, its not biodegradable

I’m confused on what uu trying ask

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.