A city street is Select one: a. a public good when it is congested, but it is a common resource when it is not congested. b. always a common resource, whether or not it is congested. c. always a public good, whether or not it is congested. d. a common resource when it is congested, but it is a public good when it is not congested.

D. a common resource when it is congested, but it is a public good when it is not congested.

Explanation: A public good is a good that individuals cannot be excluded from its use and the use of it by one individual does not reduce its availability to others while a common resource is a resource which no individual can be excluded from using, but it's availability may be subject to rivalry.

Therefore during congestions, a city street is a common resource as availability for use is limited and a public good when it is not congested as there's both access and availability for use.

well, paralell is parallel. i am providing links to .

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a series circuit is one with all the loads in a row. there is only one path for the electricity to flow. if this circuit was a string of light bulbs, and one blew out, the remaining bulbs would turn off.

unlike in series circuits, a charge in a parallel circuit encounters a single voltage drop during its path through the external circuit. the current through a given branch can be predicted using the ohm's law equation and the voltage drop across the resistor and the resistance of the resistor.

a parallel circuit has certain characteristics and basic rules: a parallel circuit has two or more paths for current to flow through. voltage is the same across each component of the parallel circuit.