Here's a breakdown:

* Transpiration: The process where plants release water vapor into the atmosphere through tiny pores called stomata on their leaves.

* Why it happens: Transpiration is essential for plant life. It helps regulate temperature, move nutrients throughout the plant, and create the force needed to pull water up from the roots.

* What is lost: The primary loss during transpiration is water. However, small amounts of dissolved minerals can also be lost along with the water.

Let me know if you have any other questions about transpiration!