So why bother? Why do trees put so much effort into vertical growth? It depends on the species. Some grow tall to disperse their seeds more effectively. Other species do it to protect their leaves from terrestrial tree-eaters, like the acacia tree trying to stay out of reach from the giraffe. But for most trees, height is all about getting more sun. A forest is an intensely competitive place, and sunlight is a scarce but critical resource. And even when you’re a redwood, the tallest of all tree species, you still have to worry about getting enough sun because you’re in a forest of other
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