What is the first to emerge from the seed and brings water into the plant from the environment?

Hi!

The answer is The Radicle

This is the first thing to emerge from the seed and brings water into the plant from the environment. 

The Radicle is the primary root, it emerges in approximately 2-4 days, breaking the seed vessel. It grows and fixes to the ground in the first stages of a plant's life, guaranteeing the subsequent growth and development of the plant. The water it absorbs goes to the leaves, to allow the plant to start with the Photosynthesis process and produce its own food.