Answer:
The vascular plant emerged around 400 million years ago and started Earth's forest-building process during the Silurian geologic period. Although not yet a "true" tree, this new member of the terrestrial plant kingdom became the perfect evolutionary link (and the largest plant species) with developing tree parts and considered the first proto-tree. Vascular plants developed the ability to grow large and tall with massive weight needed for the support of a vascular internal plumbing system.
Step-by-step explanation: