Final answer:
The stem is responsible for transporting water, minerals, and sugars in plants. The stem contains xylem, which transports water and nutrients, and phloem, which transports sugars.
Step-by-step explanation:
The stem is the plant part responsible for transporting water, minerals, and sugars to different parts of the plant. It contains two types of tissue: xylem and phloem. Xylem transports water and nutrients from the roots to the rest of the plant, while phloem carries the sugars made in the leaves to the parts of the plant where they are needed.