Which professional organizations provide guidelines for tree support and lightning protection?

The correct answer highlights the International Society of Arboriculture (ISA) and the Tree Care Industry Association (TCIA) as key organizations that provide established guidelines for tree support and lightning protection. The ISA is renowned for its comprehensive standards in arboriculture, focusing on research and education to enhance tree care practices. They develop and disseminate best practices that ensure the safety and health of trees, which include methods for tree support structures and lightning protection systems.

The TCIA also plays a crucial role, as it encompasses many aspects of tree care, including safety standards, training, and guidelines for the tree care industry. Their materials are vital for professionals who need reliable protocols for safe tree management, which includes the effective implementation of support systems and protection methods against lightning strikes.

In contrast, other organizations mentioned, such as the National Forest Association and the Arbor Day Foundation, primarily focus on conservation, education, and the promotion of forestry practices but do not specifically concentrate on the technical details of tree support and lightning protection. Similarly, while the American National Standards Institute is involved in creating standards across various industries, it is not solely focused on tree care, and the Environmental Protection Agency's main role pertains to environmental protection rather than tree support practices. Lastly, the Society of American Foresters