What do you call the animals whose embryos develop inside the female's body?

Options

A. Metamorphosis
B. Viviparous
C. Oviparous
D. Gestation

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks for the term used to describe animals whose embryos develop inside the female's body.

2. **Identifying Key Terms:** The key terms in the question are "embryos," "develop," and "inside the female's body."

3. **Reviewing the Options:**
- **Metamorphosis:** This term refers to the process of transformation in certain animals, such as the change from caterpillar to butterfly. It does not relate to embryo development inside the body.
- **Viviparous:** This term refers to animals that give birth to live young ones. In viviparous animals, the embryos develop inside the female's body.
- **Oviparous:** This term refers to animals that lay eggs. The embryos develop outside the female's body in eggs, so this does not fit the question.
- **Gestation:** This term refers to the period during which a mother carries her developing young in her womb, but it does not define the type of animals.

4. **Analyzing the Correct Option:** Among the options, "viviparous" is the term that directly corresponds to animals whose embryos develop inside the female's body.

5. **Conclusion:** Therefore, the correct answer to the question is "viviparous."

**Final Answer:** Viviparous animals are those whose embryos develop inside the female's body.

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