What is the name of the eon that marks the origin of life approximately 3.8 billion years ago?

The name of the eon that marks the origin of life approximately 3.8 billion years ago is the Archean Eon. This eon is significant because it is during this time that the earliest known forms of life, primarily simple single-celled organisms such as bacteria, emerged. The Archean Eon follows the Hadean Eon, which represents the period before the Earth’s crust had cooled enough to support life. It also precedes the Proterozoic Eon, which brought forth more complex life forms. The Phanerozoic Eon, coming after the Proterozoic, is known for the abundance of complex life and ecosystems we see today. The Archean Eon specifically provides crucial geological and biological evidence for the planet's early conditions and the development of life forms.