'Many XXX of creatures are becoming extinct, or are suffering steep decline in numbers. The diver-sity of XXX is necessary for the functioning of ecosystems, and in some cases endangered XXX contribute to the human food chain (eg honey bees)...'
The word which fits best is 'species'.
Aliza
19 days agoGregoria
2 days agoKaran
1 months agoGianna
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8 days agoLorrie
12 days agoStephen
2 months agoVallie
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2 months ago