What is one risk the children take while trying to stop the Whisperer?

The correct choice highlights the significant risk taken by the children as they attempt to stop the Whisperer, specifically through their decision to infiltrate the Institute. This action places them in a precarious situation, as they must navigate through a hostile environment filled with adversaries who are focused on maintaining control and secrecy. Infiltration exposes them not only to possible capture but also to various dangers related to the Institute's operations and security measures.

By choosing to engage in such a daring mission, the children demonstrate their bravery and commitment to their cause. Their decision underscores the theme of sacrifice and the lengths they are willing to go to protect others and oppose tyranny, showcasing the depth of their character development throughout the story. The other options, while related to risks in various ways, don’t encapsulate the immediate and tangible threat that comes from entering the Institute itself.