Many crops first domesticated by indigenous Americans are now produced and used globally. Chief among these is maize or "corn", arguably the most important crop in the world. Other significant crops include cassava, chia, squash (pumpkins, zucchini, marrow, acorn squash, butternut squash), the pinto bean, Phaseolus beans including most common beans, tepary beans and lima beans, tomatoes, potatoes, avocados, peanuts, cocoa beans (used to make chocolate), vanilla, strawberries, pineapples, Peppers (species and varieties of Capsicum, including bell peppers, jalapenos, paprika and chili peppers) sunflower seeds, rubber, brazilwood, chicle, tobacco, coca, manioc and some species of cotton.

Answer this question, if possible (if impossible, reply "unanswerable"): Who do we owe gratitude for even some species of cotton to?
indigenous Americans