Which of the following are essential elements of a tree’s structure?

A tree's structure is fundamentally composed of its roots, trunk, branches, and leaves, which play critical roles in its growth, stability, and functionality.

Roots anchor the tree into the ground, providing stability and allowing it to absorb water and nutrients from the soil. The trunk serves as the main support system, enabling the tree to grow tall and access sunlight. Additionally, the trunk houses the vascular system that transports water and nutrients between the roots and leaves.

Branches extend from the trunk, enabling the tree to maximize its exposure to sunlight and support leaves, which are essential for photosynthesis. Leaves are critical for capturing sunlight and converting it into energy through photosynthesis, which sustains the tree.

While flowers, seeds, bark, foliage, buds, and nuts are important for the reproduction and health of the tree, they do not constitute the core structural elements that are necessary for the tree's overall stability and functioning. The primary structural components highlighted in the correct choice are fundamental to the tree's survival and growth.