Step 1: Concept
Rice cultivation requires "puddled" soil, which means churning the soil in standing water.
Step 2: Meaning
This process breaks down the soil structure to create a muddy, soft bed that holds water.
Step 3: Analysis
As the puddler churns the mud, fine clay particles settle at the bottom to form an "impervious layer" (plough pan). This layer stops water from seeping deep into the ground (infiltration), keeping it in the root zone.
Step 4: Conclusion
The puddler is the specific implement used for this task.
Final Answer: (B)