What is an example of an unstructured question?

Multiple Choice

$"$On a scale from $1$ to $5($with $1$ being very unimportant and $5$ being very important$),$ how important is fragrance when choosing a detergent?"

"How satisfied were you with your last detergent purchase: very unsatisfied, unsatisfied, neutral, satisfied, or very satisfied?"

"Were you happy with the quality of the detergent you purchased $($Yes$/$No$)?"$

"How many brands of detergent have you purchased in the past year: $0,1,2,3,4,5,$ or more than $5?"$