Punctuation marks are important for recognizing the end of a statement and or drawing some out with an ellipsis. If you do not put them at the end of your writing/sentence, unless using a question mark(?) or exclamation point(!), then the reader/grader will not be able to know where your sentence ends and the new one begins, therefor rendering it a run on sentence.
Answer:
The theme of your story can be as broad as 'love' or 'loneliness' or as narrow as the idea that 'death is the unifying human experience'. It can also be a universal statement about humanity that an author investigates or explains through the course of a story.
Answer:The answer- Then we set up our tent and unrolled our sleeping bags inside.
Explanation: I have just took the test.