Final answer:
The term used to refer to broad classes that characterize resources, such as equipment or vehicles, is 2) 'group'. This concept relates to organizing items with common characteristics into categories, which is practiced in various fields for clarity and order.
Step-by-step explanation:
The term used to refer to broad classes that characterize like resources, such as teams, equipment, supplies, vehicles, and aircraft, is group. This term aligns with the concept of classifying things based on common properties or characteristics. For example, when sorting parts in a shop, one might group items like screws into one category based on their shared characteristics.
Similarly, class systems in society are formed based on people's socioeconomic status and proximity to power, differentiating them by wealth and influence. Creating groups or classes is a fundamental concept in organization and is applicable across various domains, whether it be sorting common objects, classifying teachers, or grouping living organisms.