Why does the production possibility curve consistently exhibit a concave shape?

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Because the slope becomes steeper when moving downward along the curveSince the marginal utility declines with increased consumption of a goodIt illustrates the principle of rising opportunity costsDue to the limitation of available resourcesNone of the above

Explanation

The production possibility curve is concave because it demonstrates the law of increasing opportunity cost, which means producing more of one good requires sacrificing increasingly larger amounts of the other good.