Weathering and erosion played a big role in forming the grand canyon. The rock was being weathered, most likely mechanical weathering, and then it eroded away. Think of a pebble that is in running water. When you pick it up, it is smooth, right. But before, it was pointy. So, the grand canyon was once a big rock, and weathering broke through it making it one of the wonders of the USA.
la respuesta a esta pregunta es Conclusion
A good conclusion restates the hypothesis so that the reader will get was was the hypothesis made by the person and weather it was correct or not, if not then it has logical explanation to it. Conclusion also tells/summary of your project/essay
