Rescue the dog by finding the string tied to its tail, can you do it?

On a bridge, there is a dog with its tail tied to a rope. Your task is to observe carefully and find the rope to rescue this animal.

Find the rope that is tying the dog's tail in this picture!

This seemingly simple puzzle has left many people "straining their eyes and brains" to find the answer. How long will it take you to rescue the poor dog from the mysterious rope?

Please leave your answer in the comment box below!

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Source: https://vtc.vn/giai-cuu-con-cho-bang-cach-tim-ra-soi-day-buoc-duoi-no-ban-lam-duoc-khong-ar800235.html