Answer:
the entry of competing firms will shift the firm's demand to the left
Step-by-step explanation:
If a monopolistically competitive firm is earning a profit in the short then as a result this will induces the new firms to enter into the market and earn a profit. So, the entry of the new firms will increase the overall competition among the firms. Therefore, the demand for each firm's product decreases and this will shift the demand curve for firm's product leftwards.