Which of the following best explains why the biosphere is a key component of the earth’s systems? a. the biosphere is a key component of the earth’s systems because it is a common concept to many disciplines in science. b. the biosphere is a key component of the earth’s systems because the seasonal cycles directly affect primary productivity. c. the biosphere is a key component of the earth’s systems because it drive the other systems by interacting with and exchanging matter and energy with the other spheres. d. the biosphere is a key component of the earth’s systems because it has evolved to create the chemical composition of the planet we know today.

The correct answer would be c. The biosphere is a key component of the Earth’s systems because it helps drive the other systems by interacting with and exchanging matter and energy with the other spheres.  

Biosphere refers to the region of the earth which is occupied by living organisms. It includes all the spheres of the earth; the atmosphere, hydrosphere, and lithospheres.

Thus, it is the region where two or more spheres interact and exchange matter and energy with each other.

For example, nutrient cycle, water cycle, et cetera includes the interaction of different spheres and exchange of matter (nutrients and water) and energy in these spheres.

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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