Introduction:
Ravens are known for their exceptional problem-solving abilities, which have been studied extensively by researchers. Their cognitive behavior plays a crucial role in enabling them to solve complex problems and find innovative solutions. This ability is not solely based on genetic imprinting or mating preferences but is primarily attributed to their cognitive capabilities.

Cognitive Behavior of Ravens:
Ravens have been found to showcase a wide range of cognitive abilities, including reasoning, problem-solving, and tool use. They are capable of understanding cause and effect relationships, recognizing themselves in a mirror, and planning for the future. These cognitive skills have been observed in various experiments conducted by researchers.

Tool Use and Problem-Solving:
One of the key demonstrations of ravens' problem-solving abilities is their use of tools. They have been observed using sticks and other objects to extract food from hard-to-reach places. This behavior requires understanding the concept of using an external object as a tool, highlighting their cognitive prowess.

In addition to tool use, ravens have also shown the ability to solve puzzles and navigate complex situations. For example, in a study conducted by researchers at Lund University, ravens were presented with a task where they had to use a series of tools in a specific sequence to access a food reward. The ravens were able to solve the task successfully, indicating their cognitive flexibility and problem-solving skills.

Social Learning and Innovation:
Ravens also exhibit social learning and innovative behavior, which contribute to their problem-solving abilities. They can learn from observing other ravens and adopt their techniques to solve similar problems. This ability to learn from others and innovate allows them to adapt to new situations and find novel solutions.

Conclusion:
The extraordinary problem-solving abilities of ravens are primarily attributed to their cognitive behavior. They demonstrate a wide range of cognitive skills, including reasoning, problem-solving, and tool use. Their ability to learn from others and innovate further enhances their problem-solving capabilities. Therefore, the correct answer to the question is option 'B' - Cognitive Behavior.