<ul><li>Evergreen trees, such as spruces, pines, and firs, have a pyramid shape in response to wind, snow, and light.</li><li>The shape of their leaves, usually needle-shaped or scale-like, helps them in climates with blowing ice crystals.</li><li>The pyramid shape keeps wet, heavy snow off the upper branches and reduces wind resistance, helping the tree stand upright.</li><li>The layered branches and open area between layers allow wind to pass through and ensure adequate light reaches lower branches.</li></ul>

Why does an evergreen tree have a pyramid shape?

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