The part of Earth that supports life, including the top portion of the crust, all waters covering the surface, and the surrounding atmosphere, is called the biosphere.

Here's a breakdown:

* Crust: The outermost layer of Earth, where life as we know it exists.

* Waters: This includes oceans, lakes, rivers, and groundwater, providing a habitat for aquatic life.

* Atmosphere: The layer of gases surrounding Earth, providing oxygen for breathing and protecting us from harmful radiation.

The biosphere is a complex and interconnected system where all living things interact with their physical environment.