ISA Certified Arborist Practice Exam 2025 - Free ISA Arborist Practice Questions and Study Guide

A tree failing, such as through structural failure or uprooting, can indeed lead to significant damage to people or property. This can occur in various ways, including falling branches or the entire tree, which poses a direct threat to anyone nearby and can cause serious injuries. Additionally, the destruction of structures, vehicles, landscapes, or other plants in the vicinity can result in expensive repair costs and legal liabilities.

While some of the other options might appear beneficial, they do not accurately represent the immediate consequences associated with tree failure. For example, improved soil composition or enhanced biodiversity may occur as part of a longer-term ecological process but are not direct outcomes of a tree's failure. Similarly, while surrounding trees might benefit in the long term from reduced competition if one tree fails, this benefit does not outweigh the immediate dangers and damages posed by the actual failure of the tree itself.