ISA Certified Arborist Practice Exam 2025 – All-in-One Resource for Comprehensive Exam Success!

Decurrent growth is characterized by a wider tree growth at the base and gradually tapering towards the top, resembling a cone shape. Excurrent growth is the opposite, where the tree grows with a main central leader and branches growing outward. Incurrent growth is when the tree has multiple trunks that grow inward instead of upright. Concurrent growth is when multiple trunks grow simultaneously, resulting in a more balanced and upright appearance. Therefore, options A, B, and D are incorrect as they do not describe the rounded or broader tree growth seen in decurrent growth.