Fill in each blank with the suitable words given in the box.
(cutting ,asexual , sexual, grafting , tuber, bulb , spore)
In ______ a branch of one plant is joined to the stem of another.

Explanation

To fill in the blank in the sentence "In ______ a branch of one plant is joined to the stem of another," we need to identify the correct term from the provided options: cutting, asexual, sexual, grafting, tuber, bulb, spore.

### Step-by-Step Solution:

1. **Understand the Context**: The sentence describes a process where a branch of one plant is joined to the stem of another plant. This is a method of plant propagation.

2. **Analyze the Options**:
- **Cutting**: A method of asexual reproduction where a part of the plant is cut and planted to grow a new plant.
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