Câu 153E7.23-154

Read the following sign then answer the questions.


Attention!

Some park visitors have been intentionally stacking piles of rocks as an art form or for amusement. Please refrain from doing this on park grounds, as these unofficial rock stacks can disrupt sensitive habitats and affect the area’s natural beauty.
New rock piles can also endanger hikers who traditionally rely on stacked rock markers as navigational tools. Park officials are the only ones who should be stacking rocks, and they do so strategically on trails where the path may be unclear. If you see rocks that have been stacked, please leave them alone, and do not create confusion by making your own stack.