The xylem is a special tube of the plant that take up the red food coloring. The food coloring travels into the stem and into the leaves of the celery. It is increased by vaporization from the leaves of the celery. It is like blood exploring through the human body. This shows how the plants deliver the nutrients it absorb to all its parts.
Answer - Option 3 - The xylem transported the water through the stem and to the leaves of the plant.