Which word is the odd one out? 1) bird, flower, tree, plant 2) stone, rock, soil,...

Question

Which word is the odd one out?
1) bird, flower, tree, plant
2) stone, rock, soil, climate
3) water, air, snow, ice
4) help,save,waste,protect
5) toxic beautiful,brilliant,fabulous

Answer 1

1)bird
2)soil
3)snow
4)waste
5)toxic