It isn't. An iambic pentameter needs 5 iambic "feet" - 5 sets of unstressed then stressed syllables, i.e the Ocean SYMboLISED his DEATH and LIFE.
This committee should inform the president of its recommendations.
The reason for the selection of this possessive pronoun is that "this" is in singular form and has to agree with the possessive pronoun that we choose.
Normally, collective nouns, such as committee, refer to a group of people and it is acceptable to refer to them by both singular and plural pronouns. Here, though, it sounds more natural to use "its" instead of "their" because of "this" which is in singular form.
Can you be more specific??
Ballads are usually only 13 lines so they are short