问题: Inthelastsentenceofthesecondparagraph,theword“islands”refersto
A: thelandsthatarecompletelysurroundedbywater.
B:thewildanimals’breedinggroundsprotectedbylaw.
C:thepiecesoflandseparatedbymodernbuildingsandroads.
D:thesmallandisolatedareasinhabitedbycertainspecies.
