In Arizona, monsoon season generally runs during the summer months heading into September. The heaviest rainfall in Arizona usually occurs during the months of July or August. Therefore, there is a correlation between rainfall amount and the monsoon season in Arizona.

The statement says Arizona’s heaviest rainfall usually occurs in July or August, which fall during monsoon season. Since rainfall amounts tend to be higher during that season, rainfall amount and monsoon season are correlated. The correct choice is T.

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