Here's why:

* Vascular plants have specialized tissues called xylem and phloem, which form tubes that transport water and nutrients throughout the plant.

* Nonvascular plants lack these tubes, so they must rely on other methods to move water and nutrients. They typically live in moist environments where they can absorb water directly from their surroundings.

Some common examples of nonvascular plants include:

* Mosses

* Liverworts

* Hornworts

These plants are generally small and grow close to the ground. They often form dense mats in damp, shady areas.