Explanation When the actions of an individual create additional cost or benefit to another consumer who is not involved in the action, it is known as the externalities. When the impact is a positive impact, which means benefits, it is known as the positive externalities, and when they are inverse, which means additional costs, they are known as the negative externalities. Option (b): The cost is imposed on the consumer who is not the consumer of the good or service, which indicates that the action creates additional costs to the individual. Since such costs are known as the negative externalities, option 'b' is correct. Option (a): The price floor is the minimum price that the government determines for the commodity. When there is a price floor, the minimum price for the commodity is being determined in the market...