Language used to help the reader experience the subject matter with their senses, especially to help them see it.

imagery
allusion
tone
theme

don't guess.

To determine the correct answer, we need to understand the definitions of each term provided and their relevance to the given question.

1. Imagery: Imagery refers to the use of words or phrases that evoke sensory experiences and create vivid mental images for the reader. Writers use descriptive language to engage the five senses (sight, sound, taste, touch, smell) and make the reader feel more present and connected to the subject matter.

2. Allusion: Allusion is a literary device in which a writer refers to a person, place, event, or work of art, either directly or indirectly. Writers commonly use allusions to add depth and meaning to their writing, relying on the reader's familiarity with the referenced material to convey certain ideas or emotions.

3. Tone: Tone refers to the attitude or perspective of the writer towards the subject matter or audience. It is conveyed through the choice of words, sentence structure, and overall style of writing. The tone can be formal, playful, serious, sarcastic, or any other mood that enhances the reader's understanding and emotional response to the text.

4. Theme: Theme refers to the central idea or underlying message in a work of literature, speech, or other artistic expressions. It is the broader concept or universal truth that the writer explores and conveys throughout their writing. Themes can be moral, philosophical, societal, or relate to human experiences and emotions.

Out of these given options, imagery is the language used to help the reader experience the subject matter with their senses. The writer utilizes descriptive and evocative language to create mental images and engage the reader's senses. Therefore, the correct answer is imagery.