Respuesta :
It refers to the cost or benefit of an activity by an economic agent for which it does not pay a price.
Fr ex: factory produces goods , it releases harmful smokes n polluts our enviroment.
In this case externality implies the negetive effect.
Hope it helped u!!
A.
It is a change in demand brought about by factors other than price.
B.
It is the external factors that cause a rise in the supply of goods or services.
C.
It is the external factors that cause a decrease in the supply of goods or services.
D.
It is the impact of production and consumption on unrelated third parties.