Option 1 -> Domestic work involves economic activities without market transactions or monetary payment.
Option 2 -> Externalities are spillover effects on third parties, not household labor.
Option 3 -> Not the standard economic classification for unpaid household work.
Option 4 -> Social services typically refer to government/organizational welfare programs.
Hence, Option 1: Non-monetary exchanges -> Domestic services performed by women at home (such as cooking, cleaning, childcare, and household management) are classified as non-monetary exchanges because they involve productive economic activities that create value but do not involve market transactions or monetary compensation. These services, while not captured in GDP calculations, represent significant economic contributions to households and society. They are exchanges of labor and care within the household without financial payment, distinguishing them from market-based economic activities. -> correct