Cuba is a command economy that suffered a decline in economic growth because of a cut in the aid provided by the former soviet union when the latter collapsed. as a consequence, cuba:

Experience an inward shift of its production possiblity curve.

Explanation:

Production possiblity curve is a graphical representation of the maximum number of products that a company can produce, if it produce only two product using all the resources efficiently. The maximum production possiblity of one product is shown on one side graph and another product on other side to compare which product can be produced to reduce cost and wastage while maximizing the profit. This also help the management to know the effecient use of resources or factor of production; Land, labour, capital and entrepreneurship. Therefore, lack of resources to Cuba have lead it´s economy to decline.

b. a single paragraph.

a paragraph is a series of sentences that are organized and make sense, and are all related to a single topic . almost every piece of writing you do that is longer than a few sentences should be organized into paragraphs. this is because paragraphs show a reader where the subdivisions of an essay begin and end, and thus the reader see the organization of the essay into subjects in order to be able to understand its main points.