What does Kino learn from his best friend, Jiya, about why the houses in the fishing village do not have windows facing the sea?

In the village, the houses face one another, but the ones nearest the sea do not have windows facing it. Kino often wonders why since he enjoys looking at the waves, and he learns the reason when he meets Jiya whose father is a fisherman. Jiya tells Kino, "The sea is our enemy" (page 4).