Final answer:
The kind of context clue where a sentence repeats or uses words with similar meanings is known as repetition, which is used to emphasize themes or create rhythms.
Step-by-step explanation:
The kind of context clue where a sentence repeats or uses words with similar meanings is called repetition. This form of repetition includes the reoccurrence of words or phrases throughout a text and is often used for emphasis, to suggest continuity of ideas, or to create pleasing rhythms. For example, in Martin Luther King Jr.'s iconic 'I Have a Dream' speech, the refrain 'I have a dream' is repeated to emphasize the theme of his vision for civil rights. Similarly, in literature such as F. Scott Fitzgerald's 'The Great Gatsby', the green light is a motif that is repeated throughout the text, signaling its significance.