How is East Asian writing system unique to other world writing systems?

Question

Quizplus · Accepted Answer

East Asian writing system is unique in that it uses characters that represent ideas rather than sounds. This means that people literate to the writing system can read the same script without being able to speak the same language. It is also true that it is very difficult to learn, and literate persons must memorize thousands of characters, making all of the above options correct.

How Is East Asian Writing System Unique to Other World