The author builds an argument culminating in a core message, which is emphasized in the sentence "言葉が通じなくても、心が通じ合えばコミュニケーションはできるのだと気づきました". The option "言葉が通じなくてもコミュニケーションはできるということ。" perfectly captures the main theme and the author's primary perspective. When tackling N3 main-point questions, focus on sentences near the end that summarize the author's thoughts or feelings. The other options are incorrect because they focus on minor details, misinterpret the author's tone, or state views opposite to the author's thesis.