Take another look at the sentence:
Folding the pile of T-shirts into perfect squares, Cory's laundry chores
got completed.
Folding the pile of T-shirts into perfect squares, a participle phrase, comes right before laundry chores, an illogical target. [Cory's, a possessive noun, functions as an adjective describing chores.] People, not chores, have hands that can fold clothes! Before you continue, review the rules for misplaced and dangling modifiers.
Go back to the sentence to try again.