Step 1: Understanding secondary activities. 
  
Secondary activities are those that involve manufacturing, processing, or construction. These activities transform raw materials into finished products, such as industries, factories, and cottage industries. 
Step 2: Identifying the non-secondary activity. 
  
Hunting is a primary activity, as it involves direct use of natural resources without any processing or manufacturing. In contrast, manufacturing, processing, and cottage industries belong to the secondary sector. 
Step 3: Conclusion. 
  
Therefore, the correct answer is (A) Hunting, as it is a primary activity and not a secondary one.