Whats heavier?
100 pounds of gold
100 pounds of feathers

They both weigh the same. A pound of feathers vs. a pound of rocks. A pound is a pound, and whether it is a pound of feathers or a pound of rocks, it doesn't matter. As a matter of fact, they both weigh one pound

recent brain research has shown some surprising benefits as a result of formal musical training. learning to play a musical instrument appears to develop parts of the brain that can even influence academic results. the studies indicate that the earlier a child begins training, the more benefits there are. one such study showed that children who began musical studies before the age of seven had a more developed brain in the region where language production and auditory processing take place. scientists believe there is mounting evidence to show that early musical training can improve brain function.

explanation:

the answer should be the first one. "many people find his lyrics very moving."

it by far makes the most grammatical sense and is very objective, removing any first person from the original sentence and keeping with the sentence fluency.