True.
It is easier since there are a lot of theories that could sum up and provide evidence to support that an object has life than life itself.
One popular theory is the cell theory which states that all organism is made up of cells, cell that came from those pre-existing cells, and reproduce by those cells themselves.
Both the terms "living" and "biotic" describe an organism that holds life. However, an organisms stops "living" after it dies, but never stops being "biotic". This is because "biotic" means anything that has ever had life, whereas "living" only describes things currently alive.
Photsynthesis to make food
The geosphere is the solid part of the earth. It has three components which are: the core, mantle and the crust. Thus, the mantle is a component of the geosphere.
