How does the stem help a tree?

The stem, or trunk, of a tree provides structural support, allowing the tree to grow tall and access sunlight for photosynthesis. It transports water and nutrients from the roots to the leaves through specialized tissues called xylem and phloem. Additionally, the stem stores energy in the form of carbohydrates, which can be used during periods of growth or stress. Overall, the stem plays a crucial role in the tree's health and survival.