Fertilization is internal in

Options

A. Amphibians
B. Star Fishes
C. Bony Fishes
D. Sharks.

Answer

To determine which organism has internal fertilization from the given options, we can follow these steps:

### Step 1: Understand Internal Fertilization
- Internal fertilization occurs when the male and female gametes fuse inside the body of one of the organisms, typically leading to the development of embryos within the female.

### Step 2: Analyze the Options
- **Option A: Amphibians** - Most amphibians (like frogs) typically exhibit external fertilization, where eggs are laid in water and fertilized outside the body.

- **Option B: Starfishes** - Starfishes also reproduce through external fertilization, releasing eggs and sperm into the water.

- **Option C: Bony Fishes** - Similar to amphibians and starfishes, bony fishes generally reproduce via external fertilization, laying eggs in water.

- **Option D: Sharks** - Sharks are known to have internal fertilization. They are viviparous, meaning they give birth to live young after internal fertilization has occurred.

### Step 3: Conclusion
- Based on the analysis, the organism that exhibits internal fertilization from the options provided is **D: Sharks**.

### Final Answer
- The correct answer is **D: Sharks**.

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