Many animals ______ on stable climate conditions., depend, Human activity is ______ for climate change., responsible, There has been a sharp ______ in the number of polar bears., decline, Climate change is a serious ______ to wildlife., threat, Some animals try to ______ contact with humans., avoid, Scientists are trying to ______ awareness of environmental problems., raise, Tourists should not ______ with animal behaviour., interfere, This could be a ______ of danger., sign, ______ activity has a strong impact on nature., Human

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