What role does propping play in tree support systems?

Propping plays a crucial role in tree support systems by providing stabilization to trees or branches that may be at risk of failure due to structural weakness or environmental conditions. When a tree or its branches are propped, it supports them in compression, effectively reducing the risk of bending or breaking under their own weight or external stresses such as wind or snow. This preventative measure helps maintain the tree's structural integrity, allowing it to remain healthy and functional in its environment.

The other options do not accurately reflect the function of propping. Propping is not designed to be ornamental nor is it utilized for electrical purposes or soil moisture calibration. Its primary focus is on providing direct support to ensure the safety and longevity of trees.