Answer:
All the cards crumble around when he blew hard.
Step-by-step explanation:
An adverb is a word that modifies or tells us more about a verb. And an adverb of place tells us where the action is done. In other words, we can say an adverb of place tells us where the verb occurs.
In the given sentence, the main verb is "crumble" and the noun is "all the cards". Therefore, the adverb of place for the given blank is "around".
Thus, the final sentence will be
All the cards crumble around when he blew hard.