Why do some trees grow tall and thin whilst others are short and stubby?

Tree growth forms are influenced by a combination of genetics, environmental conditions, and evolutionary adaptations. Tall, thin trees, like pines, often grow in competitive environments where reaching sunlight is crucial, while short, stubby trees, such as certain oaks, may thrive in denser forests or harsher climates where stability and resource conservation are more beneficial. Additionally, factors like soil type, water availability, and wind exposure also play significant roles in shaping a tree's growth habit.