Final answer:
The correct answer to the riddle is 'B) Love', as it symbolizes passionate affection and is metaphorically represented by the word 'mate' when separated from 'checkmate' in chess.
Step-by-step explanation:
One turn in chess becomes passionate affection is an example of a riddle that plays on words. The term 'checkmate' in chess signifies the end of the game by placing the opponent's king under an inescapable threat of capture. When we remove 'check' from 'checkmate', we are left with 'mate', which in British English is often used informally to refer to a friend or companion. However, if we look at the options given, we can interpret the question as a play on words, meaning the word 'mate' is akin to the term of endearment or affectionate bond referred to as love. Therefore, the correct answer to the question is 'B) Love'. This is also supported by the definition of love as the object of attachment, devotion, or admiration, or an assurance of affection, which is what a chess game's ending could metaphorically represent if one were to view it passionately.