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Solution
The correct option is A Observation 1 - Temporary
Observation 2 - Permanent Among the given options:
1. Inflating balloons is a temporary change as once the air escapes out, the balloon comes back to its original shape and size. Hence, the change caused by inflating a balloon can be undone. 2. Harvesting crops is a permanent change as once the crops are harvested they cannot be planted back to grow.