What is the main idea of the passage? A. The history and formation of the Grand Canyon B. The wildlife of the Grand Canyon C. The climate changes in the Grand Canyon D. The Grand Canyon: A bĐoạn vănGiải thích34/40What is the main idea of the passage? The history and formation of the Grand Canyon The wildlife of the Grand Canyon The climate changes in the Grand Canyon The Grand Canyon: A breathtaking natural wonder