Take another look at the sentence:
Sipping the glass of iced tea, Marilyn's parched throat was soothed by the
cool liquid.
Sipping the glass of iced tea, a participle phrase, comes right before parched throat, an illogical target. [Marilyn's, a possessive noun, functions as an adjective describing throat.] A person, not a throat, does the sipping! Before you continue, review the rules for misplaced and dangling modifiers.
Go back to the sentence to try again.