Step 1: Understanding the Question:
The question asks for the specific horticultural term for the removal of the main growing tip (terminal bud) of a plant to encourage the growth of side shoots (lateral branches).
Step 2: Key Formula or Approach:
This requires understanding the concept of "apical dominance" and the different horticultural practices listed. The terminal bud produces auxins that suppress the growth of lateral buds below it. Removing this bud breaks the dominance and allows side branches to grow.
Step 3: Detailed Explanation:
Let's define the terms:
(B) Pinching (or tipping): This is the precise term for removing the soft, new growth at the end of a stem. This action breaks apical dominance, leading to a bushier, more compact plant with more branches.
(A) Pruning: This is a more general term for cutting away dead, overgrown, or unwanted branches and stems. While it can involve removing terminal buds, 'pinching' is the more specific term for this particular action.
(C) Grafting: A propagation technique where parts of two plants are joined to grow as one.
(D) Layering: A propagation technique where a stem is encouraged to root while still attached to the parent plant.
Step 4: Final Answer:
The specific process of removing the terminal bud to promote lateral branching is called pinching. Therefore, option (B) is correct.