@serenityjade- if you were to say that of the opposite direction, one could infer it's talking about the energy expended... i mean what else would fit that pertained to the sentence? i think the shorter answer is just as clear as the longer one... /:
It doesn't matter if a person can infer the meaning. In scientific writing, they aren't supposed to have to. The reader supposed to outright be told every single thing with as much detail as possible. And I'm so used to it that I never gave the question a second thought.
It doesn't really have to do with scientific writing. It's more to do with parallelism. In comparisons as much common structure as possible should be retained. Just a general grammar rule.
@bleach340, I wasn't saying that I answered that way because scientific writing says so. I answered that way because the scientific subject made me go with the specific answer as that's proper in scientific writing. I don't know if it's what the collegeboard wanted but it's what I was compelled to put.
