What do you call hints that are found in sentences, paragraphs, or passages that can be used to understand a new or unfamiliar word?

Which among the following is a type of context clue?

Noting context clues is a skill that can help you develop vocabulary as students

The contest was open to both amateur and professional lay-out artists. What is the meaning of the word amateur?

This type of context clue are words with same meanings that are used in the sentence or nearby sentences

Arrange the jumbled words to form a correct sentence.

Antonyms are words with the same meaning.