The following text discusses animal behavior.
Elephants are known for their exceptional memories, but scientists have discovered they may also have a sense of self. In mirror tests, elephants recognize their own reflections and use the mirror to examine parts of their bodies they cannot normally see. This ability, shared only with great apes, dolphins, and a few other species, suggests a level of self-awareness once thought unique to humans.
Which choice best states the main idea of the text?
Elephants have the best memories in the animal kingdom
Research suggests elephants possess self-awareness similar to some advanced species
Mirror tests are the only way to measure animal intelligence
Great apes and dolphins are more intelligent than elephants
Correct Answer: B
Choice B is the correct answer. The text focuses on elephants recognizing themselves in mirrors, indicating self-awareness "once thought unique to humans."
- Evidence: Elephants pass mirror tests like great apes and dolphins.
- Reasoning: This demonstrates a capacity for self-awareness.
- Conclusion: Elephants show self-awareness comparable to other advanced species.
Choice A is incorrect because memory is mentioned but isn't the main focus. Choice C is incorrect because the text doesn't claim mirrors are the only measure. Choice D is incorrect because no comparison of intelligence levels is made.