I believe the correct answer: is it suggests that one
opponent is much smaller than the other.
In this excerpt from the newspaper "A David and
Goliath Battle Rages Over Sunshine Park", the mentioning the David and
Goliath suggest that one of the opponents in much smaller than the other. This
Biblical parallel alludes that even If regarded as the “small opponent”, Chelsea
Spree has an opportunity to win, just as David had.
I'm guessing the central idea of "the value of music that tickles the brain" is that music makes you smarter, increases IQ level, makes language development smoother, enhances creativity, and increases the reactions in your brain to work faster. Music has many benefits and these are just a few. You can always also just research on the topic of music effects on the brain online. Hope it helps!