Which of the following scenarios best illustrates the principle of diminishing marginal returns in production?

Diminishing marginal returns is a concept in economics that describes how adding more of one factor of production, while keeping others constant, will eventually yield lower increases in output. For example, imagine a farmer who grows corn on a fixed piece of land. If he starts by adding more workers, the corn production increases significantly at first. However, after a certain point, if he keeps adding more workers without expanding the land, each new worker contributes less to the total yield because they start to get in each other's way. This shows that while more workers can help, there’s a limit to how much they can increase production when the land size stays the same.