It- (I) Liver - Liver lobule
II. kidney- Uriniferous tubule
III. Ecolog:y - X
then what does"X" represent ?

Options

A. Biotic community
B. Ecosystem
C. Population
D. All of the given

Answer

To solve the question, we need to identify the relationship between the terms given in the pairs. Let's break it down step by step.

### Step-by-Step Solution:

1. **Understanding the First Pair: Liver - Liver Lobule**
- The liver is an organ that is composed of smaller functional units called lobules. Each lobule is a structural unit of the liver.

2. **Understanding the Second Pair: Kidney - Uriniferous Tubule**
- The kidney is another organ, which is made up of functional units known as uriniferous tubules (or nephron). Each uriniferous tubule is responsible for filtering blood and forming urine.

3. **Identifying the Third Pair: Ecology - X**
- Now, we need to find what "X" represents in the context of ecology.

4. **Defining Ecology:**
- Ecology is the branch of biology that studies the interactions between living organisms and their environment. It encompasses various levels of biological organization.

5. **Identifying the Component of Ecology:**
- Just as the liver is made up of lobules and the kidney is made up of uriniferous tubules, ecology is made up of ecosystems. An ecosystem is a community of living organisms interacting with each other and with their physical environment.

6. **Conclusion:**
- Therefore, "X" represents "Ecosystem" in the context of the relationship established in the previous pairs.

### Final Answer:
**X represents Ecosystem.**