You cannot put any sort of endmark (period, question mark, or exclamation point) here because it is not a complete sentence. Complete sentences must have a subject and a predicate. You can tell there's not even a verb here, so this is just a fragment, and we would have to use a comma.
a. Very truly yours,
Panic would give you extreme fear to the point where you're frozen.
"nor how they sometimes fall short" (line 8)
I hope this is the passage you are referring to.
This poem is regarding a cat that should go home but has soo much more to do. It expresses how the cat hears the call to come home but instead continues to enjoy its own activities.
Hope this helps
Answer:
I think she said everything in detail for those who would want to perform the same experiment
This paragraph seems to be describing Nessie.
So I’d go with the second option.