That is a very vague question. The simplest answer would be birth from an egg or uterus.
an egg
By little tiny cells that joined together. My teacher told me.
Homosexuality began wherever life on Earth began.Homosexuality began with the dawn of animal life on Earth.
According to the latest evidence, between 700 and 600 million years ago.
As the trees are removed life there (plants and animal) begin to die unless new plants are introduced
It all starts like this.... A female animal and a male animal has a baby then the baby feeds on the mother then they are separated then the baby grows up to an adult and then it starts all over again...
unknown.
when they are born
A rose can begin it's life in a few different ways. It can begin it's life as a seed or as a rose branch.
Dogs are the animal life
Canadian geese
ferret