SUGGESTIONS:
Divergent and convergent plate boundaries can form ridges (R), trenches (T), and/or faults (F). The shortened ‘R’ ‘T’ and ‘F’ are used to symbolize when put together what kind of structures are formed on the plate boundaries.
the perfect scenario would be Ridge-Ridge-Ridge or ‘RRR’, one for each edge of the colliding t-shape. (For me, I found this easier to follow. I had to reread the paragraph to understand the assignment of junctions.)
Pacific Plate would all meet at a complete 'T' shape (why is this a perfect scenario? What makes it perfect and how would that affect the surrounding geology? - Later I saw that Ridge-Ridge-Ridge is a perfect scenario, but why?)
3 different rift areas, an extended volcanic ridge, and a large dominant spreading center (citing the rift areas, extended volcanic ridge and spreading center could provide information for people that do not know what they are.)
In the last paragraph, bathymetry could be explained and how it is helpful in defining the plate boundaries.