The Question: The flower of what spice depends primarily on hand pollination by humans?
Vanilla is one of the most popular and lucrative spices in the world, but it’s also one of the most labor intensive. The vanilla orchid has only a couple of natural pollinators, native to a few specific geographic regions, so nearly all commercially produced vanilla is hand-pollinated by humans. The technique for doing so was developed in 1841 by an enslaved boy named Edmond Albius on the island of Réunion, and it requires deft fingers and perfect timing — which is why natural vanilla is so expensive (around $300 per pound).
The correct answer is Vanilla.