Step 1: Define the activity sectors in terms of innovation.
Primary and Secondary activities can involve innovation, but it is not their defining feature.
Quaternary activities are knowledge-based (e.g., R& D, IT), involving a high degree of innovation.
Quinary activities represent the highest level of decision-making and idea generation. This sector includes top executives, senior government officials, and top-tier research scientists whose role is to create, evaluate, and implement new ideas, technologies, and policies. This is the sector most fundamentally centered on innovation and high-level decision making.
Step 2: Compare Quaternary and Quinary. While the quaternary sector deals with knowledge, the quinary sector is often described as the "brain" behind the knowledge, focusing on the creation of new ideas and innovations at the highest level. Therefore, it is the sector where the highest levels of innovation are included.