Final answer:
The "epoch of human life" refers to the Holocene epoch, which captures all recorded human history but due to significant human influence on Earth's systems some scientists suggest we are now living in a new epoch called the Anthropocene.
Step-by-step explanation:
The term "epoch of human life" is often associated with the currently ongoing geologic epoch known as the Holocene. However, given the significant impact humans have had on Earth's ecosystems and climate, some scientists propose that we are now living in a new epoch called the Anthropocene. This term while not officially recognized in the geologic time scale, is used to express that human activity has become the dominant influence on the planet's biology and geology since the Industrial Revolution.
The Holocene epoch is part of the Quaternary period, which falls within the current eon the Phanerozoic characterized by abundant animal and plant life. As for why this particular epoch is associated with human life it is simply because it is the time period during which all recorded human history has taken place including the development of civilizations and the large-scale alteration of Earth's surface and atmosphere.