C. all life
The correct answer for the fill in the blank is C) All life.
Biosphere is defined as the region of the planet earth where all the organisms ( like plants and animals) are living and interacting with their environment. It comprises of all the ecosystems.
This means that biosphere includes the regions of earth that support the survival of all life forms.
Thus, option C) All life is the right answer.
The correct answer is option c. "all life".
The biosphere is the ecological system of the Earth that supports all life and their relationships among them and with the non living elements of the lithosphere, geosphere, hydrosphere, and atmosphere. The biosphere is an unique layer of the Earth because is considered thee sum of all the ecosystems and it gives all the elements needed to support life.
b. animal life
c. all life
d. human life
The answer is C. all life
All life is the answer you are looking for
a. plant life