text: However , it may be difficult to reintroduce EW species into the wild , even if their natural habitats were restored , because survival techniques , which are normally passed from parents to offspring during parenting , may be lost .
simplified: It is very hard to reintroduce EW species into the wild , even if their natural habitats were fixed . The main reason may be that the survival skills , which are passed from parents to offspring during parenting , are lost .