Answer:
Nonvascular:
-lack true roots and stems.
-rely on diffusion
-usually small in size
-divided into three groups (these are mosses, liverworts, and hornworts.)
Vascular:
-can be almost any size
-have specialized tissues (these are phloem and xylem)
Step-by-step explanation:
Nonvascular plants are plants that cannot retain water because they have no vascular tissue. Vascular plants do have vascular tissue, so they can retain water.
Hope this helps. :)