原题
Ravens are highly intelligent birds known for their problem-solving abilities and complex social behaviors. They u tools, su as sti, to obt food a have be observed enga in pla behaviors li sliding o snow. Ravens communicate with a wide range of vocalizations, conveying different messages to their peers. Their adaptability allows them to thrive in various environments, from forests to urban areas. Studying raven behavior provides insights into avian intelligence and the evolutionary mechanisms that support cognitive development.
参考答案：se ch cks ain nd en ging yful ke n
解题思路
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