A participle is a word that takes the verb form of past particple (-ed form) or present participle (-ing form) but functions either as an adjective or a noun in the sentence. The word in the given sentence above that is a participle is "wrinkled". This participle is in the -ed form, but functions as an adjective that describes the word "shirts".
"There" is like someone saying you left your bag over there as in a position or location
