Odd one — Neem
Reason — Neem is a plain region tree, while Pine, Fir, and Cedar are found in mountainous regions.Odd one — Deer
Reason — Deer is found in forests or plains, while Reindeer, Polar bears, and Penguins are adapted to polar regions.Odd one — Fur
Reason — Fur is a feature of land mammals, whereas Scales, Fins, and Gills are adaptations of aquatic animals.Odd one — Mango
Reason — Mango seeds are dispersed by animals, while Cotton, Poppy, and Drumstick seeds are dispersed by wind.Odd one — Cactus
Reason — Cactus is a desert plant, while the others are Aquatic plants.