Answer:
Earth formed around 4.54 billion years ago, approximately one-third the age of the universe, by accretion from the solar nebula. Volcanic outgassing probably created the primordial atmosphere and then the ocean, but the early atmosphere contained almost no oxygen.
Explanation:
The answer is c as mitosis is the division of cell into two daughter cells which also helps in the growth of body and also it helps to repair any wound and injury
internal-organ function, breathing, digestion, and heartbeat. This system consists of two complementary parts: the sympathetic and parasympathetic systems.
Some don't have any able to see effects,but some cause diseases
