Final answer:
It is true that arousal can lead to an increase in attention towards a message to understand the source of arousal, relating to the Yerkes-Dodson Law which suggests an optimal arousal level for performance.
Step-by-step explanation:
When arousal occurs, it is true that we tend to pay more attention to the message in order to understand the source of the arousal. This phenomenon is aligned with the Yerkes-Dodson Law, which postulates that there is an optimal level of arousal for performance. Too little arousal can lead to underperformance, just as too much can interfere with the ability to process information effectively. The moderate level of arousal helps in focusing our attention and resources on the task at hand, including the processing of relevant messages and information.