A coral island with a central shollow lake is known as

Options

A. Coral reef
B. Lagoon
C. Atoll
D. Corallite

Answer

To solve the question "A coral island with a central shallow lake is known as," we can follow these steps:

### Step 1: Understand the Terms
First, we need to understand what a coral island is and the different types of coral formations. Coral islands can take various forms, and it's important to distinguish between them.

### Step 2: Analyze the Options
The options provided are:
1. Coral reef
2. Lagoon
3. Atoll
4. Coral island

### Step 3: Define Each Option
- **Coral Reef**: A structure made of coral polyps that forms in shallow waters.
- **Lagoon**: A shallow body of water separated from a larger body of water, often found behind a barrier island.
- **Atoll**: A ring-shaped coral reef or island that encircles a lagoon partially or completely.
- **Coral Island**: A general term for islands formed from coral debris.

### Step 4: Identify the Correct Answer
The question specifically mentions a "coral island with a central shallow lake." The description matches the definition of an **atoll**, which is characterized by a central lagoon surrounded by a ring of coral.

### Step 5: Conclusion
Based on the definitions and descriptions analyzed, the correct answer is **Atoll**.

### Final Answer
A coral island with a central shallow lake is known as **Atoll**.

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