Question

analyzing word choice: figurative language — quiz — level h
\true, but its rude to be staring at your phone during a block party,\ brigid texted back.

just then, curtis flicked his fingers in a way that shot sparks onto a nearby shrub. dry from the lack of rain that summer, the shrub lit up like a match. brigid watched as people backed away from the scene and someone shouted to call for help. though small now, she knew the fire could become a monster if it got out of control.

nadia appeared at her side. she pointed to the pool. \we can stop this,\ she said, wiggling her fingers, the webbing having appeared as she fought the urge to release her true identity.

brigid bit her lip. they could wait for the firefighters to arrive and hope theyd stop the fire before it ruined mr. moores house and tumbled through the rest of the city. that would be the safe thing to do, the move that would keep their water powers secret. but it wasnt the right thing to do.

brigid squeezed nadias shoulder. \get everyone out of here.\

why does brigid bite her lip?
she must choose whether to stop the fire or protect her mermaid identity.
she must choose whether to keep her sister safe or keep herself safe.
she must choose whether to save the house or help the rest of the city.
she must choose whether to be all mermaid or all human from now on.

Explanation:

Brigid is conflicted: using her mermaid water powers would stop the fire, but it would reveal her secret identity. Biting her lip shows her struggle between this choice. The other options don't match the text: there's no mention of choosing between her sister's safety vs her own, saving only the house vs the city, or choosing full mermaid/human status.

Answer:

She must choose whether to stop the fire or protect her mermaid identity.