It is released through nitrogen - fixing bacteria
All rock on the ocean floor is less than 180 million years old because <span>reverse polarity removed older rock strips magnetized in a different direction. Also,</span> the oldest parts reach the continental crust and then the ocean floor sinks beneath the continental crust, into the mantle.
It is c your answer for your questions
Pacific Coast. As this area is in the bottom left and therefore has the highest hazard according to the key.
