What is magma?
solid rock with a fine texture
cooled rock with large crystals
molten rock below earth's surface
flowing rock above earth's surface

C. molten rock below the earth's surface

Explanation: Magma is called magma because that is the name of lava before it comes out of the ground.

Molten rock below Earth's surface.

Magma is actually melted rock that is hot enough to flow or a hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling.

i think its the first one

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.