Question

one area of challenge for learning by observation theorists is ________. single-track on anti - social emphasis on observing others single - track on pro - social a focus on child development

Explanation:

Learning by observation (e.g., social learning theory) has a challenge of being single - track on pro - social behavior sometimes, but among the options, "a focus on child development" is a key challenge as observation - based learning theories in this area often center heavily on child development and may not fully account for other aspects or age groups. The other options: "single - track on anti - social" is not a main challenge, "emphasis on observing others" is part of the theory not a challenge, and "single - track on pro - social" is less central as a challenge compared to the narrow focus on child development.

Answer:

a focus on child development