Meaning: This sentence says the fox can go back the same way it came so its footprints are hidden. (Grammar note: use 'knows' instead of 'know'.)
Three simple rephrasings for a 7-year-old:
- The fox can walk back the same path to hide its footprints.
- The fox knows how to go back over its tracks so no one can follow.
- The fox can follow its own steps backward to cover its trail.
Quick note: All three sentences mean the same thing but use easier words.