托福TPO15第一篇阅读文章的句子简化题有问题 求解答！

托福TPO15第一篇阅读文章的句子简化题有问题 求解答！
原句是—— Glaciers move slowly across the land with tremendous energy, carving into even the hardest rock formations and thereby reshaping the landscape as they engulf, push, drag, and finally deposit rock debris in places far from its original location.
我觉得这里的主语是glacier，谓语动词是move，engulf, push, drag, deposit，那么carving和reshaping是修饰energy的吗？
我选的答案是
As a glacier moves, it leaves behind rock formations that have been engulfed, pushed, and dragged by the glacier.
正确答案是：
Glaciers reshape the landscape by carving into rock and transporting the resulting debris to distant locations.
感觉两个都还行啊。。