Kapok trees will inevitably be targeted by herbivores when they grow in the wild, so in the long-term evolution process, a self-protection mechanism has emerged-countless spikes grow directly on the trunk, like nails, to achieve defense and prevent small animals from climbing to the tree and hurting the kapok tree.
These spikes won't last long. As long as the kapok tree grows tall enough, it will gradually peel off and fall off.