_____ resources are essential, human-made items for producing goods or services.

Resources in economics are essential, human-made or natural items that serve as inputs used to produce goods or services. They are often referred to as factors of production and can be categorized into four main types: land (natural resources), labor (human effort), capital (man-made equipment and tools), and entrepreneurship (the ability to organize these inputs). These resources are vital for producing goods and services that meet human needs and wants, and their efficient use and allocation are key to economic growth and prosperity.