My belief that it was an answer to the Girl’s call for prayer. My Pastor was just talking about this last Sunday. God expects you to take the first steep, even if it be a ting one before he extends his help. The sea parted, by it was the sinple act of faith when Moses extended his staff that started it.
There’s a considerable literature which cites examples and contends that visitations from angels who have temporarily taken human form are not uncommon in times of stress, peril, and/or fear.
I tend to believe it, although, never having had such an encounter, I can’t speak from experience.