What is the clue about the exact nature of the operation in Hills like White Elephants?

In Ernest Hemingway's "Hills Like White Elephants," the exact nature of the operation is hinted at through the dialogue between the characters, particularly the man's insistence that "it's really an awfully simple operation" and the woman's ambivalence about it. The hills themselves symbolize the choice and the divide between acceptance and rejection of the situation. The subtlety of their exchange, filled with tension and unspoken emotions, suggests that the operation is an abortion, reflecting deeper themes of communication, choice, and the complexities of relationships.