Final answer:
The subsistence strategy characterized by seasonal crop cultivation, supplemented by gathering and hunting, and reliant on human muscle power is called horticulture. It's a form of plant cultivation that also may include other subsistence practices like gathering wild plants and hunting animals.
Step-by-step explanation:
The subsistence strategy that involves seasonal crop cultivation, supplementation with wild plants and animals, and relies on human muscles in labour is called horticulture. Horticulture is a form of plant cultivation, which is one of the four main modes of subsistence, alongside gathering-hunting, pastoralism, and industrialism. This approach is often practiced by societies that are settled but may not have access to the advanced technologies that characterize intensive agriculture. Instead, these societies depend primarily on the physical labour of humans to cultivate crops. They may also use simple tools to assist in their efforts to grow food sufficient for their community. In addition to growing seasonal crops, these groups may gather wild plants, hunt wild animals, or fish, which complements their cultivated food sources.
The combination of farming along with gathering and hunting allows for a resilient strategy in case crops fail or to incorporate nutritional variety. Many societies that employ horticulture also interact with other subsistence strategies, such as keeping domesticated animals or trading with neighbouring groups specialized in other forms of subsistence strategies.