Explanation:
Verbs are words that demonstrate an action, such as sing, dance, smell, talk, and eat. When combined with linking verbs, such as is, must, will, and has, they form verb phrases. Verb phrases can consist of one to three linking verbs, and action verbs, and sometimes any complements (such as objects or direct objects).
Answer: Complex sentence.
Explanation: a complex sentence is a sentece formed by an independent clause (a phrase that has complete meaning on its own) and at least one subordinate or dependent clause (a phrase that doesn't have completin the given excerpt meaning on its own). In the given sentence we have a subordinate clause: "While I was cleaning out my closet the other day" and an independent clause: "I came across my favorite pair of childhood shoes: purple and black jellies with gold buckles."
Spelling and grammar mistakes.