Final answer:
Elected officials prioritize other issues they consider more important and younger Americans do not vote in large numbers, which may explain why their concerns are not a priority.
Step-by-step explanation:
The main factor that helps explain why elected officials may not prioritize the concerns of younger Americans is that they prioritize other issues that they believe are more important. Elected officials may have differing opinions on what issues need immediate attention and may focus on areas they believe will benefit their own political careers. Another contributing factor is that younger Americans do not vote in large numbers, so their concerns may not be seen as a priority by elected officials.