What three criteria that make a resource scarce?

A resource is considered scarce when it meets three key criteria: limited availability, meaning the quantity is finite and cannot meet total demand; high demand, where the resource is sought after by many users or industries, increasing competition for it; and no perfect substitutes, indicating that there are few or no alternatives that can fulfill the same need effectively. Together, these factors create a situation where the resource's value increases due to its scarcity.