Most= pronoun and determiner
plants= noun
get= verb
their= determiner
nutrients= noun
from= preposition
soil= noun
The correct answer is parallel plot structure.
When it comes to parallel plot structure, it means that there are several characters whose stories we can see within a particular text. First we see what's going on with one character, then another one, etc. and at one point, they are going to meet, and there will be only one story from that point onward.