Honestly, I used to think it was just the tree drinking, like a straw! But my friend, a biology teacher, says it’s a brilliant pull from above, as water evaporates from the leaves and tugs the whole column up. My own proof? Tuning my old pena. The bamboo dries out from the top, and you can see the moisture vanish, pulling the oil from the base upward to keep the *thawai* alive. Same thing, but with more music.
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