The apostrophe is used when the two words are put together
it is ---> it's
When there is doubt, the possession use (for example: the farmer's cow)does not rate an apostrophe.
So I believe you are correct.
Which of the following sentences uses apostrophe correctly?
A. She enjoyed the movie and told me it's scenery reminded her of her hometown.
B.You really ought to take up fly-fishing-- it's a very relaxing hobby.
C.This is a fine piece of furniture, and it's merits speak for themseleves.
D.She wants to study music in all of it's various genres.
Answer:B looks correct but is a bit tricky ,am I correct.
3 answers
Here is an example from Wikipedia:
"That noise? It's just the dog eating its bone."
"That noise? It's just the dog eating its bone."
Apostrophes are used for contraction. You are correct!