I can suggest some sentences:
1) you can describe what it was:
Manifest Destiny was the belief that settling in America was a destiny, or right, of the settlers.
2) you can describe its effect:
Manifest Destiny was a belief that justified many injustices towards the indigenous people because it suggested that the settlers had a right for the land, which in turn undermined the indigenous claim to the land.
Answer:
Legal barriers limiting entry
Explanation:
Legal barriers limiting entry are obstacles that make it difficult to enter a specific market. These barriers sometimes include regulations required from the government and sometimes patents, technology challenges, start-up costs, or licensing and education requirements. They can be both beneficial and/or harmful to the economy.
One expanded would be like any part of the national culture