ISA Certified Arborist Practice Exam

During the process of respiration in a tree, the correct answer is energy conversion. Respiration in trees involves breaking down sugars through a series of chemical reactions to release energy that the tree uses for various functions such as growth, reproduction, and defense mechanisms. This energy conversion process is essential for the tree's survival and overall health.

Carbon dioxide intake is part of the photosynthesis process where trees absorb carbon dioxide and release oxygen. Sugar production happens during photosynthesis when trees convert carbon dioxide and water into sugars using light energy. Leaf shedding is a natural process through which trees drop their leaves as a response to changing environmental conditions, such as seasonal changes.