Final answer:
The subject of this question falls under the field of Sociology in the broader subject of Social Studies. The scholar studied the experiences of teenagers and early adults across different societies, focusing on the biological and cultural aspects of being a teenager.
Step-by-step explanation:
The subject of this question falls under the field of Sociology in the broader subject of Social Studies. The scholar mentioned in the question studied different societies to investigate the experiences of teenagers and early adults. They specifically looked at the biological and cultural aspects of being a teenager. This research helps us understand the impact of factors such as biology and culture on the lives of teenagers.