Step 1: Understanding the Concept:
Sowing methods are categorized based on seed placement patterns, spacing, and mechanical processes.
Step 3: Detailed Explanation:
Let us define each of the sowing methods:
1.
Dibbling: Sowing seeds in small holes made in the soil at regular, measured intervals.
2.
Drilling: Dropping seeds in furrows in a continuous stream at a controlled depth and covering them with soil.
3.
Hill dropping: Placing groups of seeds at uniform spacing intervals along the row.
4.
Broadcasting: Randomly scattering seeds over the soil surface, followed by shallow covering.
Thus, dropping seeds in furrows in a continuous flow is defined as drilling.
Step 4: Final Answer:
The correct option is 2, which corresponds to Drilling.