Final answer:
Harris Burgers' action of buying up several competitors is an example of mergers and acquisitions, a business strategy used to grow a corporation's size and market power.
Step-by-step explanation:
When Harris Burgers buys up several of its competitors, this action is known as mergers and acquisitions. A merger involves two firms joining to form a single large corporation, which can increase their size, efficiency, allow for new product lines, eliminate rivals, or result in the loss of a corporate identity. An acquisition is when one firm purchases another with the aim of achieving similar benefits, often resulting in one more powerful firm absorbing a less powerful one. This strategy is employed for business growth and can sometimes trigger antitrust laws that aim to maintain competitive markets.