careless prudent (Adjective) : sensible and careful when you make judgement and decisions : avoiding unnecesary risks. dunce (N.): a person, especially a child at school, who is stupid/slow to learn
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Assertion: Predators in nature are 'prudent'. Reason: If a predator is too efficient and overexploits its prey, then the prey might become extinct and following it, the predator will also become extinct for lack of food.
Assertion: Introduction of alien species is responsible for extinction of indigenous species. Reason: Alien species have no natural predator. So they causes uncontrolled predation and donot show prudent nature.