Answer:
Labor has been overlooked
Explanation:
The factors of production are what people use to produce goods and services. Economists divide the factors of production into four categories: land, labor, capital, and entrepreneurship.
The first factor of production is land, but this includes any natural resource used to produce goods and services. William Welsh obtains a loan and purchases the necessary land
The second factor of production is labor. Labor is the effort that people contribute to the production of goods and services. Labor resources include the work done as the work of the pilot flying the airplane overhead. He needs pilots for his helicopters he has overlooked it.
The third factor of production is capital. Think of capital as the machinery, tools and buildings humans use to produce goods and services. His capital are his helicopters, loan facilities
The fourth factor of production is entrepreneurship. An entrepreneur is a person who combines the other factors of production - land, labor, and capital - to earn a profit. William Welsh is the enterpreneur