This is taken from my class on the Tanya taught by Rabbi Gordon.
Creation is made up of four parts inanimate, animate, vegetable, and human. The human being is highest form of creation. Yet the human being cannot live without the lower forms of creation.
The human being cannot live without animals.
The animals and man cannot live without vegetable or vegetation.
And neither the human being, the animals and vegetables or vegetation cannot live without water or minerals.
So how is it that man needs the lower forms of creation to live?
The answer lies in the Torah.
The Torah states that not by bread alone can man live. Man lives on the word of G-d invested in the bread.
Why is this so?
It is the higher word of G-d invested in the lower that keeps us humans alive.
The Toho energy is invested in the mineral and animal and this Toho energy sustains us.