Environmental Science
The most important human activity, leading to the extinction of wildlife, is

Introduction of alien species
Alternation and destruction of the natural habitats
Pollution of wildlife, is
Hunting for valuable wildlife products

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Environmental Science
Mycorrhiza represents

Parasitic association between a fungus and an alga
Symbiotic association between a fungus and liverworts
Symbiotic association between a fungus and roots of higher plants
Parasitic association between a fungus and roots of plants

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