Step 1: Understanding the Concept:
Societies are classified based on their means of subsistence.
Each type has a specific economic base.
Step 2: Key Formula or Approach:
No specific formula.
Need to know types of societies.
Step 3: Detailed Explanation:
A pastoralist society relies on domesticated livestock.
Hunter-gatherer societies rely on hunting and gathering.
Agrarian societies rely on crop cultivation.
Industrial societies rely on manufacturing.
Thus, a pastoralist society is based on livestock.
Step 4: Final Answer:
A society with livestock as primary subsistence is pastoralist.
Hence, the correct option is (A).