Asexual reproduction is a type of reproduction that involves only one parent and does not require the formation of gametes (sex cells). In this process, offspring are produced that are genetically identical to the parent. Let's explore why option 'A' is the correct answer in more detail.

Gametes formation does not occur:
Asexual reproduction does not involve the formation of gametes, which are specialized sex cells. Gametes are typically formed through a process called meiosis, where the parent cell undergoes two rounds of cell division to produce cells with half the number of chromosomes. These cells then combine during fertilization to form a new individual with a unique combination of genes.

Fertilization does not occur:
Since asexual reproduction does not involve the formation of gametes, there is no need for fertilization. Fertilization is the process by which male and female gametes combine to create a zygote, which develops into a new individual. In asexual reproduction, the offspring are produced directly from the parent without the involvement of another individual or the fusion of gametes.

Gametes formation does not occur:
As mentioned earlier, asexual reproduction does not involve the formation of gametes. Instead, the parent organism directly produces offspring that are genetically identical to itself. This is typically accomplished through various methods such as budding, fission, fragmentation, or spore formation. These processes allow the parent organism to produce clones or exact copies of itself.

Variation is not created:
One of the key characteristics of asexual reproduction is that it does not create genetic variation. Since the offspring are genetically identical to the parent, there is no opportunity for new combinations of genes to occur. This means that any genetic traits or mutations present in the parent organism will be passed on unchanged to the offspring. As a result, asexual reproduction tends to produce populations of organisms that are very similar to each other.

In conclusion, asexual reproduction does not involve the formation of gametes, fertilization, or the creation of genetic variation. The parent organism directly produces offspring that are genetically identical to itself, resulting in populations of organisms that are highly similar.