Final answer:
The subject of this question is English, and the grade level is Middle School. The correct answer would be 'Through', which implies movement or passage.
Step-by-step explanation:
The subject of this question is English. The question is asking about the meaning or definition of the given words. The words provided are 'Through', 'Together', 'Tomorrow', and 'Throughout'.
The correct answer would be 'Through'. This is because the word 'Through' implies movement or passage from one side or location to another. It can be used to describe physical movement (e.g. walking through a door) or abstract concepts (e.g. getting through difficult times).
Therefore, the subject of this question is English and the grade level is Middle School.