The process of meiosis produces genetically unique reproductive cells called gametes, which have half the number of chromosomes as the parent cell. Fertilization, the fusion of haploid gametes from two individuals, restores the diploid condition.

Meiosis cell division is involved in gametes formation as gametes contain half the numbers of chromosome a normal cell diploid cell contain. Gametes fuse to produce zygote.##@

Sexual reproduction involves the fusion of gametes, which are specialized cells that are produced through a process called meiosis. Meiosis is the correct answer (option C) because it is the only type of cell division that results in the formation of gametes.

Here is a detailed explanation:

1. Introduction to sexual reproduction:
- Sexual reproduction is a type of reproduction that involves the fusion of gametes from two parents.
- It leads to the generation of offspring with genetic variation, as the combination of genetic material from two parents results in unique combinations of traits in the offspring.

2. Gametes and their formation:
- Gametes are specialized sex cells that are involved in sexual reproduction.
- In humans, gametes are sperm cells (produced by males) and egg cells (produced by females).
- Gametes are haploid, meaning they contain half the number of chromosomes compared to the parent cells.
- This is important because when the gametes fuse during fertilization, the resulting zygote will have the correct number of chromosomes.

3. The process of meiosis:
- Meiosis is a specialized type of cell division that occurs in the reproductive organs (testes and ovaries) to produce gametes.
- It involves two rounds of cell division, known as meiosis I and meiosis II, resulting in the formation of four haploid daughter cells.
- Meiosis I: During this phase, the homologous pairs of chromosomes separate, resulting in two daughter cells with half the number of chromosomes.
- Meiosis II: In this phase, the sister chromatids of each chromosome separate, resulting in the formation of four haploid daughter cells.
- These daughter cells will mature into gametes (sperm or egg cells) that are ready for fertilization.

4. Other types of cell division:
- Mitosis is a type of cell division that results in the formation of two identical daughter cells, each with the same number of chromosomes as the parent cell.
- Equational division is a term not commonly used in biology and does not specifically refer to a type of cell division.
- Amitosis is a type of cell division that occurs in some unicellular organisms, where the nucleus divides without undergoing the usual phases of mitosis or meiosis.

In conclusion, sexual reproduction involves the fusion of gametes, which are specialized cells produced through meiosis. Meiosis is the correct answer (option C) because it is the only type of cell division that results in the formation of gametes.