Earth formed about years ago, and the oldest known living organisms date to years ago.
a. 4.6 billion years ago 3.5 billion years agob. 6,000 years ago 6,000 years agoc. 13.7 billion years ago 4.6 billion years agod. 3.9 million years ago 2.0 billion years ago

The answer is A.

Explanation:

According to the researchs and studies, the earth formed about 4.54 billion years ago and the oldest known living organism date to around 3-3.5 billion years ago which are the first bacteria that formed in the water.

I hope this answer helps.

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

after making a punnet square using bv bv bv bv you will find that the ratio will be 9: 7 or a 128.6% probability.

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