Concept: A quota is a government-imposed physical limit on the quantity of goods that can be imported into a country within a stated period.
Explanation: Quotas are used in international trade to protect local industries from foreign competition.
They control supply by restricting the volume, not by adding a financial charge.
A total ban on imported goods is described as an embargo, not a quota.
A tax on goods produced within a country is an excise duty or local tax.
A tax on goods produced outside a country is an import duty or tariff.
By removing these options, the quota is clearly a physical restriction on quantity.
It limits how many units of a particular product can cross the border.
Answer: B. a physical restriction placed on quantity of goods that can be imported