The Earth was formed approximately 4.56 billion years ago (option C) in a period referred to as the Hadean Eon. This was a part of the Precambrian time, which ended approximately 541 million years ago with the emergence of most kinds of life.
The Earth was formed approximately 4.56 billion years ago. This period of formation is often referred to as the Hadean Eon, named after the Greek god, Hades, due to the 'hellish' conditions on Earth at the time. Therefore, the correct answer to your question would be C. 4.56 Ga.
In terms of geological time, this falls under Precambrian time, a period that extends from the formation of Earth to the emergence of most kinds of life approximately 541 million years ago. While it's hard to comprehend such vast timescales, scientists have used various dating methods, including radiometric dating and the ages of the oldest known terrestrial rocks and meteorites, to verify these timescales.
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