C. Vegetation
because even though cows are important, all life is and not just that species and then cars and factories are unnatural and would not be critical for the carbon cycle in nature.
Answer:The plants should float around, we’d no longer be in orbit. With are plants roaming of course the life on Earth would end and it’s likely for plants to collide
Explanation:
I would say that the answer is D.
The first law. Planets orbit is an ellipse with the Sun at one focus.