Lena dancing and laughing whenever her sister does is an example of social learning, which means she learns as she observes her sister.
What is social learning?
According to the theory developed by Albert Bandura, social learning refers to the learning through the observation of those around us. In other words, children pay attention to the behaviors and reactions of those who surround them, such as family members, and then imitate that behavior.
That is what is being described in the passage we are analyzing here. Lena is only thirteen months old, but she can already observe and imitate her sister's behavior. That is, therefore, an example of social learning.
With the information above in mind, we can conclude that the answer provided is correct.
Learn more about social learning here:
https://brainly.com/question/14980406
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