What kind of animal do you think made these footprints?
What kind of animal are these footprints from?
ーWhat kind of animal do you think made these footprints?
「この足跡はなんの動物がつけたと思う？」
make these footprints で「これらの足跡をつける」
ーWhat kind of animal are these footprints from?
「この足跡はなんの動物のだと思う？」
... are these footprints from? を使っても表現できます。
ご参考まで！
カナダ 
