The life cycle represents the process of

1 separation from parent

2 asexual reproduction

3 metamorphosis

4 extinction

The correct answer would be metamorphosis.

Metamorphosis is a biological process by which an immature form transforms into an adult form passing through numerous distinct stages.

It is mainly observed in amphibians and insects. For example, frog and butterfly.

The life cycle of a butterfly can be summarized as shown below.

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.