Assertion: When alien species are introduced unintentionally or deliberately for whatever purpose, some of them turn invasive, and cause decline or extinction on indigenous species .
Reason: Because of lack of natural enemies alien species grow rapidly.
Text Solution
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Assertion: True ,Introduced (alien) species can become invasive and cause decline/extinction of native species.
Reason: True ,In new habitats, they often have no natural predators or competitors, so they grow rapidly.
Explanation ,Lack of natural enemies is a key reason why alien species become invasive.
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