YOU SAID:

A fox gives birth so it has a belly button. A turtle lays eggs so it doesn't have a belly button.

INTO JAPANESE

キツネは出産するため、へそがあります。カメは卵を産むので、へそがありません。

BACK INTO ENGLISH

The fox has a navel to give birth. Turtles lay eggs and have no navel.

INTO JAPANESE

キツネは出産するためのおへそがあります。カメは卵を産み、へそがありません。

BACK INTO ENGLISH

The fox has a navel to give birth. Turtles lay eggs and have no navel.