Answer:
OF is the best choice to generate ideas
<span>for 17 the third on is wrong because of the punctuation. 19 i believe the correct answer is the 2nd one, for 18 it is the first one and finally for 20 it is the 4th one because the semicolon joins two independent clauses. Hope this helps!</span>
The tone is the way the author expresses his attitude through their writing.
The tone can change, or stay the same way throughout the literary work.
Tone is expressed by your point of view, your diction, etc.
Hope this helped!