Answer is this
D-the author is speculating but not proving concrete evidence
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.
In writing, sensory language is a way for a writer to help the reader see or connect with an image, description, action, or scene. Sensory language is language that connects to the five senses (sight, sound, smell, taste, touch) to create an image or description.