Most birds have feathers that make "whooshing" sounds when they fly. Owls have feathers that result in near-silent flight, allowing them to sneak up on prey. Explain how natural selection led to this adaption for owls.

The correct answer to this open question is the following.

Although there are no options attached we can say the following.

The owl is one great example of how mother nature helps its creature to evolve and adapt to different circumstances. The owl has mutated over the years and genetic modifications have allowed it to become a silent hunter at night.

What happens with the owl's wings is that the owl is capable to alter the turbulence or the wind and reduce the noise produced by the air. The serrated form of its wings has small fringes that according to zoologist, allows the owl to reduce the noise produced by the air. That is why when the owl flies, it is practically undetected by the prey.

marginal cost is a microeconomic measure that us to evaluate the extent to which the level of production of a good is sustainable in accounting, that is, to how many quantities the company plans to profit from the production of the good.

the concept of marginal cost is simple, it means the cost of producing one more item. for example, in the case of pies, the marginal cost is the cost of producing one more pie than those that have already been produced.

it is important to understand that productive activity influences marginal cost. the marginal cost of some goods can be very high, while others may be insignificant. for example, the marginal cost of producing an extra plane is very high. already the marginal cost of a water company to provide 1l more water is derisory.

in the case of pies, the cost involves the inputs, the labor and the fixed cost, which involves the fixed space of the bakery. the level of production initially has the marginal cost decreasing because there is space and manpower available. however, to produce more you have to hire more workers and buy more inputs. if physical space is limited, workers will conflict with places, inputs and their productivity will decrease, meaning there is an optimum point of production for each level of space and manpower. from this point on, the productivity of the workers will be getting smaller because of lack of space, so that the marginal cost of producing one more pie will be increasing. so, although you have not posted the chart, but if you have the answer, you can see that my explanation goes according to the marginal cost curve that will increase from the 4th pie, answer (c).