Answer:

by the process of evolution,

or just because of perfection of earth and sun and moon , or maybe the probability of God

Explanation:

it's a mystery

If the universe did begin with a rapid expansion, per the Big Bang theory, then life as we know it sprung from nonliving matter. ... It proposes that in Earth's prebiotic history, simple organic matter was exposed to energy in the form of volcanoes and electrical storms

Are u a boy...