It helps improve spike stability by alternating between crops with deep roots and those with shallow roots. Pests are also put off because their food source keeps changing.
The native is the best way
206 bones are found in the adult, human skeleton.
Thanks for the points.
The gradual abundance of oxygen (by product of photosynthesis) made it possible for aerobic organisms to grow more and evolve.
Hope that helps!
I think the answer is Passive