In what specific type of market structure are firms more likely to use low-cost price leadership, price wars, and/or price threatening to their rivals? Discuss how a firm can become such a “low cost”

I just need a small post nothing crazy:

In what specific type of market structure are firms more likely to use low-cost price leadership, price wars, and/or price threatening to their rivals?

Discuss how a firm can become such a “low cost” price leader that affects the business strategies of its rivals.

Choose an industry or a market and give an example of how a firm that is a low-cost price leader enforces its leadership through implied threats to its rival(s).