No she didn't... She said that butterflies just visit all pretty flowers, and should not be killed.
Okay.. Because you see, your teacher, she buys all her cabbage from the supermarket. Thats why she is telling you this.
The girl told her grandmother, what she had been told at school. The teacher meant that butterflies were just beautiful symbols.
Her grandparents were quiet for a long time
The grandfather meant that a butterfly is only "beautiful" for those who doesn't grow their own crops. For rich, white people who just go in to the store, and dont think about where the food comes from.