Name a term used for gradual declining of activity of plant, leading to its death

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a specific term that describes the gradual decline in the activity of a plant, which ultimately leads to its death.

2. **Identifying the Process**: The process that describes this gradual decline in plant activity is known as "senescence."

3. **Defining Senescence**: Senescence refers to the biological aging of a plant. During this process, the plant's activities and characteristics begin to degrade and disrupt over time.

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