In the excerpt from "Big Water" by Andrea Curtis, it can be inferred that Henry and Ava have made sacrifices or taken actions that significantly impact Daniel and the narrator. The way they appear to be proactive or caring toward Daniel and the narrator suggests a strong bond or sense of responsibility among them. For example, if the excerpt indicates they are involved in providing support or resources during a challenging situation, this reflects their commitment to helping others. Additionally, if the narrative highlights moments where Henry and Ava exhibit selflessness or bravery, it underscores their role as protectors or caregivers, enhancing the emotional stakes for Daniel and the narrator. These details collectively imply that Henry and Ava's contributions are pivotal to the well-being of Daniel and the narrator.
(Note: Since I don’t have access to the specific text of "Big Water," I’ve created a hypothetical analysis. For an accurate inference, please provide the excerpt in question.)