Concept:The correct word must describe the natural, winding movement of a river on a broad, flat area.
Explanation:The verb "meandered" means to follow a winding or curving course.
Rivers often meander when they flow slowly across a plain, creating bends and loops.
The complete sentence is: "The river
meandered across the plain."
"Rolled" suggests something turning over, not a river's path.
"Trickled" means flowing in a thin or weak stream, which is too small for a river.
"Passed" simply means went by, without describing the characteristic winding movement.
Therefore, only "meandered" fits the meaning perfectly.
Answer:B. meandered