Question

What made robinson crusoe think that the print on the ground was a footprint ?

Answer 1

as  it  clearly  showed  the  toes  and  the  sole  of  the  foot

Answer 2

Question -

What made robinson crusoe think that the print on the ground was a footprint ?

Answer -

The print on the ground was exactly the print of the foot as it had toes, heel and every part of a foot.

Hope it's help you