Answer:
a. Run on
Explanation:
'The Canadian side of Niagra Falls is beautiful,' is a complete thought, therefore it should be followed with a period.
Answer:
D. Neither of the above
Explanation:
Central Idea means the main idea of a story/text. All stories, if not most, have a central idea whether or not they are nonfiction.
Answer:
I don't understand this one
<u>Answer:</u>
Stop [!] the train is approaching.
<u>Explanation:</u>
The punctuation should be an exclamation point because it used at the end of a sentence or a short phrase which expresses very strong feeling.
<em>Hoped this helped.</em>

My idea,
Addition:
Even if it rains,
Darkness are clouding in,
Come, let's change lanes
Where we can answer,
"How have we been?"
wow I am bad at poetry