Answer:
Economies of Scale
Step-by-step explanation:
Economies of Scale describes the proportionate saving in costs gained by an increased level of production. Knowing that the production of natural gas is very expensive and requires a large investment. The costs and risks of the processes required in the upstream and downstream of natural gas discourages competition. Apart from the large initial investment, a drilling company can never be totally sure that they will be able to find and extract natural gas or petroleum. So besides having to spend a lot of money, so many risk is been assumed.
In a situation where the competitor finds natural gas, in order for the downstream process to be profitable, they must be able to extract a large volume to achieve economies of scale.