an anchor holding a boat in place a snack company producing energy bars a colorful sign attracting people into a store an elevator transporting supplies from one floor to another
I gave my students this multiple choice question: The stem is an important part of many plants. Which of the following is most similar to the role performed by the stem of a plant?

Only one answer is correct among these 4 choices:
- an anchor holding a boat in place
- a snack company producing energy bars
- a colorful sign attracting people into a store
- an elevator transporting supplies from one floor to another

Could you tell me which one is correct?

an elevator transporting supplies from one floor to another