Here's a breakdown:

* Transpiration is the process where water evaporates from the leaves of a plant. This creates a negative pressure gradient that pulls water upwards through the plant's vascular system.

* The vascular system refers to the xylem and phloem, which are specialized tissues that transport water, nutrients, and sugars throughout the plant.

So, transpiration is the process of water movement, while the system responsible for it is the plant's vascular system, primarily the xylem.