The correct answer is A. Amusement : Happiness.
Fury and ire are both synonyms for anger. Amusement and happiness are both synonyms for joy. A joke and a laugh are both things that can cause amusement. A convulsion and a spasm are both involuntary movements of the body. A cry and a whisper are both ways of making a sound.
In the original pair of words, fury is a more intense emotion than ire. Similarly, amusement is a more intense emotion than happiness. In the other options, the second word is not more intense than the first word.