Corpulent would most likely go with "fat" since this is often used in a derogatory way to say that something is "oversize". It comes from the Latin "corpus" being body. <span />
Answer: Motivational.
Explanation: This service announcement is directed towards kids. It's trying to encourage and motivate them to conserve energy. You can also use the process of elimination to cross out "aggressive" and "angry." It's not showing any strong emotions either, so it's not emotional.
A structual element for a poem would be stanzas. Hope this helped you a bit.