The greatest threat to global biodiversity is

Options :
  1. the introduction of alien species
  2. habitat destruction
  3. over consumption of rice, corn and wheat
  4. the spread of viral diseases throughout the world
Answer and Explanation :-

Answer: Option 2


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You see, to find the brightest wisdom one must pass through the darkest zones. And through the darkest zones there can be no guide. No guide, that is, but courage Adam Gidwitz, A Tale Dark