Answer:
What you already know
Step-by-step explanation:
When you make an inference you combine what you read with what you already know
An inference is a prediction or a guess of the text means or is trying to convey. Usually, inferences are made when there are enough details to give an indication of something, but without stating it outright.
Another way of thinking of inferences is the author using the writing concept of show don't tell.
Take the following sentence:
The little girl smiles and laughs as her dad tosses her in the air
Let's make an inference of what the girl is feeling in this situation
The little girl is smiling and laughing. We know that, in general, when people smile and/or laugh, this means that they are happy (what we know). We can thus infer that the little girl is having fun being tossed in the air. The author of the sentence does not state outright (tell) that the little girl is having fun, but rather we can assume this is the case through her actions (show)