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

Tree deformation often leads to a reduction in the overall health or stability of the tree. This can occur due to a variety of factors, including improper structural support, imbalance in nutrient distribution, or damage to the tree’s vascular system. When a tree is deformed, it may not be able to effectively transport water and nutrients, resulting in a decline in health and vitality. Additionally, structural instability increases susceptibility to environmental stresses such as wind and storms, which can lead to further damage or even tree failure.

In contrast, deformation is unlikely to enhance photosynthesis or increase biodiversity in the area, as a deformed tree may not be able to optimize light capture or effectively interact with its ecosystem. While some limitations may arise in soil stability due to certain structural roots being compromised, overall health is more directly impacted. Thus, the correct choice highlights the negative consequences that tree deformation can have on overall tree vitality and stability.