They Suggest that some time has passed.
Answer:
Characters are judged on the basis that weather they are flat or round. This means that in the whole story the characters can be described on their roles and traits regardless of being male or female.
As given stress to the word "protagonist", which means the lead character or the hero also has its own value but the character is known by its traits as mentioned earlier weather its a protagonist or an antagonist (the one who is playing a negative role against the hero).
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The lab director agreed it was one of the most innovative ideas he had ever heard
If the audience listens to the guest speaker,professor smith, they gain more knowledge