Answer:
fostering competition
Explanation:
By deciding to focus on a particular niche these smaller firms in effect foster competitions among other larger firms.
For example, if in a market for shoes, a small firm A, that is newly established decides to focus only on selling shoes for children after recognizing they cannot match up with an existing larger company B that sells a variety of shoes (both children and adult shoes). At a point in time when a number of small businesses are operating in this manner, the larger companies would recognize and account for their influence on the market.