Which agricultural practice is characterized by raising livestock in a nomadic manner?

The correct answer is characterized by raising livestock in a nomadic manner is rooted in the definition of pastoralism. Pastoralism is an agricultural practice where people rely primarily on the herding and breeding of animals for their livelihood. This practice often involves the movement of herds to find fresh pastures and water sources, which leads to a nomadic lifestyle. Pastoralists typically follow seasonal migration patterns to make the best use of the available resources, adapting to environmental conditions and ensuring the health and productivity of their livestock.

In contrast, agronomy focuses on soil management and crop production techniques, horticulture centers on the cultivation of gardens and small crops, and subsistence farming is a broader term that encompasses various agricultural practices aimed at growing food primarily for personal consumption rather than for sale. Thus, these other options do not pertain specifically to the nomadic raising of livestock that defines pastoralism.