Answer:
b
Step-by-step explanation:
Marginal satisfaction is the additional satisfaction received from consuming an additional unit of a good or service. It is the change in total satisfaction by increasing the quantity consumed by one unit
Marginal satisfaction usually declines as more units of the products is consumed
An example illustrating diminishing marginal satisfaction.
Imagine a traveller arriving from the desert where he hadn't had a drink of water in days .he is offered his first glass of water. the first cup of water he drinks would give him the highest utility. As more and more cups of water is drank, marginal utility decreases. At the point where he is fully satisfied, he stops drinking water and marginal utility becomes zero.
the decrease in marginal satisfaction of this traveller would be slower than the decrease in marginal satisfaction of a person working in an air conditioned office with easy assess to water