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An example would be the structure of a grasshopper.
The sentence:
The grasshopper has a stable structure.
Hope this helps! :)
A positive tone (if this is the one your looking for) is a happy tone of voice. If you have a positive tone ion your voice it is cheerful and nice.
A negative tone is an unhappy tone of voice. If you have a negative tone in your voice it is sad and not that great.
Hoped I helped!
Answer:
2 - The concert has been postponed
3 - The computer is currently being used
ect ect ect