**Category:** Ecology  
**Subtype:** Ecological Tolerance  
**Problem:** Understanding the concept of ecological tolerance range for organisms.

**Summary:** The problem presents multiple-choice options regarding the ecological tolerance range, which refers to the range of environmental conditions (like temperature, moisture, etc.) that an organism can withstand. The options describe different scenarios: optimal living conditions, survival with slow growth, conditions leading to death, and stable growth conditions. The task is to identify the correct definition of the ecological tolerance range.