Which of the following techniques is NOT considered advanced assessment?

The correct answer focuses on the distinction between basic and advanced assessment techniques in tree risk evaluation. Conducting visual tree inspections is fundamentally a primary technique that involves examining the tree's morphology and condition through direct observation. It serves as the basis for initial assessments and is essential for identifying visible signs of damage or decay.

In contrast, using a probe to investigate cavities, thermal imaging, and utilizing resistograph measurements are all considered advanced techniques. They require specialized training and equipment. Probing for cavities allows for a more detailed exploration of internal tree structures, which provides additional insight into the tree's health that may not be visible externally. Thermal imaging can detect differences in temperature that may indicate decay or water stress within the tree, while a resistograph measures the resistance of wood to determine its density and structural integrity, providing crucial data about potential weaknesses.

Thus, the use of a probe specifically stands out as an advanced technique, focusing on the internal condition of the tree, while the visual tree inspection remains a fundamental assessment approach.