I would go with 'Major sandstorms destroyed the crops' because the Indus Valley civilization most likely declined by something affecting the food.
The answer is the one that starts with: to exchange ideas and services.
The confederate was more successful
<u>Answer:
</u>
Option(D).
Promoting ping-pong diplomacy in China was an element of the shift toward détente in foreign policy of American in the Cold War period
<u>Explanation:
</u>
Détente is referred to the period when the tension between US and the Soviet Union was gradually loosening through communication and signing of salt treaties. during the period of cold war,It was a feature of the US foreign policy.
Ping pong diplomacy was the exchange of tennis player between United States and People Republic of China as an attempt to make the relations between both the countries cordial again.