In anisogamy / oogamy the female gamete is bigger passive non - motile and laden with food .

Answer

**Step-by-Step Solution:**

1. **Understanding Anisogamy and Oogamy:**
- Anisogamy refers to a type of sexual reproduction involving two dissimilar gametes (male and female). The male gamete is typically smaller and motile, while the female gamete is larger and non-motile.
- Oogamy is a specific form of anisogamy where the female gamete is not only larger but also passive and laden with nutrients, while the male gamete is small, motile, and often has structures like flagella for swimming.

2. **Characteristics of Female Gametes:**
- In both anisogamy and oogamy, the female gamete is larger than the male gamete. However, in oogamy, the female gamete is specifically described as passive and non-motile.
- The female gamete in oogamy is also rich in food reserves, which is essential for the development of the zygote after fertilization.

3. **Identifying the Correct Type of Reproduction:**
- The question states that the female gamete is bigger, passive, non-motile, and laden with food. These characteristics align with the definition of oogamy.
- In contrast, while anisogamy does involve larger female gametes, it does not emphasize the passive and food-laden nature of the female gamete as strongly as oogamy does.

4. **Conclusion:**
- Based on the characteristics provided, the correct answer is that these features describe oogamy rather than anisogamy.

**Final Answer: Oogamy**

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