Malik and his family came to the us a few years ago. they've managed to carve out a nice, middle-class lifestyle that they could never have imagined in their home country. through letters and phone calls, they convince their friends and extended family to come and settle in the same area. this is a pattern known as migration.

Chain migration

Explanation:

In sociology, the term chain migration refers to the process by which migrants from a particular town follow others from that town to a particular destination.

In this example, Malik and his family came to the US a few years ago, now, they convinced their friends and extended family to come and settle in the same area. We can see that his friends and family would go to the same destination were Malik is and they were convinced by him, therefore, this would be a pattern of chain migration.

sectionalism continues to divide the nation as the question of slavery being allowed in the mexican cession became a problem. -the results of the mexican war spark secession in the south because the north did not want to allow slavery in the territories won.

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).