“i don’t know the answer.” is a clause
Expository essays primarily inform readers about topics.
Expository essays are written to either describe or explain a certain idea or point that the writer is trying to get the reader to understand.
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The answer would be focal point. It is like the main place or point of her life in this sentence.
It makes the listener see and visualize what is actually going on. It can also be a very key part in a essay or speech
