Question

1. what might have caused the classical civilizations of china, rome, and india to decline

Explanation:

For the classical civilizations of China, Rome, and India, factors like invasions (barbarian invasions in Rome, nomadic incursions in China), internal political strife (civil - wars and corruption), economic issues (decline in trade, inflation), and social unrest could have contributed to their decline.

Answer:

Invasions, internal political strife, economic issues, and social unrest.