Resource Management

Step 1: Understanding the Concept:
This question is about the classification of resources based on their availability, accessibility, and the technology to utilize them.

Step 3: Detailed Explanation:
The question specifically mentions a "lack of technology" as the reason for non-exploration, which is the definition of stock resources.

Step 4: Final Answer:
Resources available but not explored due to a lack of technology are referred to as stock resources.