What is the geographic relationship between the mid-atlantic ridge the mid-indian ocean ridge and the east pacific ocean?

hey are oceanic ridges where new ocean floor is created and spreads apart is what they all have in common They are not all at the edges of tectonic plates. Neither the Atlantic Mod ocean ridge nor the Mid Indian ocean ridge are at the edge of tectonics plates. While oceanic or ridges may not be exactly in the middle of a tectonic pate. They CREATE the tectonic even some or part of an oceanic are being subjected.  

"...Almost entirely hidden under the sea is a worldwide chain of low mountains with lines of volcanic activity running along their crests. Their worldwide extent was recognized in the mid-20th century, and shortly afterward the mid-ocean ridges were assigned a starring role in the new theory of plate tectonics. The ridges are the divergent zones where oceanic plates are born, spreading apart from the central valley, or axial trough"  

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step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.