What best defines agribusiness?

Agribusiness is best defined as the manufacture and distribution of farm supplies to agriculturalists because it encompasses the entire supply chain involved in agricultural production. This includes everything from seeds, fertilizers, and equipment manufacturers to wholesalers and retailers that distribute these supplies to farmers. Agribusiness plays a crucial role in the agricultural sector by providing the necessary inputs that farmers need to produce crops and livestock.

In contrast, the sale of agricultural land to developers pertains more to real estate and urban development rather than the core functions of agribusiness. While managing public agricultural policy is important for regulating agriculture, it relates more to governmental and legislative actions rather than the commercial aspects of agribusiness. Similarly, the organization of agricultural labor unions concerns labor relations and worker rights, which, while important, do not directly define the commercial production and distribution processes intrinsic to agribusiness. Thus, option B accurately captures the essence of agribusiness by emphasizing its role in supplying resources crucial for agricultural productivity.