A quota is when there's a limit on the quantity of goods that a foreign country can bring into a particular country. This is done usually to protect the local industries in the home country and allow them grow as well.
When the U.S. imposes a quota on imported Japanese cars, this will lead to the reduction in the number of the cars brought into the country from Japan. Hence, this will lead to a demand for the cars produced in America and this will bring about an increase in the quantity demanded
I do not need my freedom when I'm dead. I cannot live on tomorrow's bread. ... The extended metaphor of tomorrow's bread also fits well as a comparison with freedom. We need bread to eat and we need freedom to live as a full person.