Which of the following does NOT affect demand?

The supply of essential goods does not affect demand.

Explanation:

Essential goods are those without which the subsistence is the most difficult. They support the living at the most basic level by making up all that needs to be necessarily used and consumed in day-to-day life. Whether or not the supply for the essential goods is sufficient, the demand for it remains unaffected. That is because the availability of essential goods is a must to lead a decent life.