Question

the process of __________ is modeled in the plant cell diagrams seen here.
a osmosis
b tonicity
c active transport
d facilitated transport
(diagrams above: hypertonic (plasmolyzed), isotonic (flaccid), hypotonic (turgid) with h₂o arrows)

Explanation:

The diagrams show water ($\ce{H_2O}$) movement across plant cell membranes in hypertonic, isotonic, and hypotonic environments. Osmosis is the diffusion of water across a semipermeable membrane, which matches the water movement shown. Tonicity (B) describes the solution's solute concentration, not the process. Active transport (C) and facilitated transport (D) involve energy or protein - mediated movement of solutes, not just water diffusion as depicted.

Answer:

A. osmosis