In one or two sentences, explain why people will do less of an activity when the marginal costs are greater than the
marginal benefits.

To reduce losses

Explanation:

Marginal cost refers to the extra expense associated with the production or sale of one more unit of a product or service. Marginal revenue is the gain derived from selling an extra unit. Marginal cost is compared to marginal revenue to determine the viability of extra production.

When marginal cost is higher than marginal revenue, it means the business is incurring a loss by selling one more product. The business is better off not selling the additional unit.  People will do less of that activity because it is not worth doing it. It is a loss-making venture.

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.