"A Tree Grows Taller by Pushing Up From the Base"
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Picturing a tree's trunk lengthening from its base overstates a real process — growth in length happens only at the tips, per Bio 2513.
Show
A tree's lower trunk, already differentiated, adds girth over the years but never grows longer once that section has matured.
Watch for
This entry states the popular image; Bio 2517 gives the fixed-height consequence that follows.