Leaf, Leaves
In the world of flowers and trees, the most important thing is the leaf. Leaves are how flowers and trees get their nutrients from the sun!
Leaves, no matter how little, are the most important thing in the world for them.
よう
は, ば
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Picture a little flower working really hard to grow its first leaf. The leaf pops out and it shouts, "Ha (は)!"
は is the sound of a leaf coming into existence. Whenever you see a plant from now on, hear the little ha sound it makes when each leaf pops out of its body.