thank you helix
like if you see a dolphin x ray you can see little leg like bones or somethiong by the fin which leads us to believe that a long time ago dolphins may have used them but not anymore
people who say there is no evolution are kinda silly cause if you look at a kiwi you see that its colorings are related to its habitat and its diet related to the habitat and lack of flyable wings to the predators etc etc and you cant say it just happened or god did it cause its all adaptations from what habitats and predators and stuff used to be like
theres better examples but thats just a quickie