It's hot outside today.
It's is the contrasted form of it is and its is the possessive form *as it is without an apostrophe*.
For example:
The tree has lost all its leaves.
It's my birthday today.
Reasonable guess (4th option)
The answer is "a<span>dverb clause"
have a great day!!!
</span>
Answer:
sleepers
Explanation:
Difference-
"Her sisters are the loudest sleepers in the house."
"Her sisters are the loudest in the house."