Based on the options provided, the most appropriate similarity between the two public service ads is:
Both ads promote a culture of safety.
While they may employ different strategies or tones—such as ethical appeals or humor—the overarching theme of promoting safety is likely a common thread. Without specific content from the ads, it's difficult to definitively assess the other options, but promoting safety has been a consistent focus in public service announcements, especially concerning automobile safety over the decades.