⓵ 주제문 -> Technology has brought both convenience and controversy.
⓶ 뒷받침 문장 1 -> First, telephones and email allow for more personalized communication.
⓷ 뒷받침 문장 2 -> Second, telephones and email allow for frequent communication.
⓸ 마무리 문장 -> In short, telephones and email make communication more personal.