Which model demonstrates how the sun generates and transfers energy? A.
Hydrogen fuses in the sun's core. This energy is radiated outward into convection zones and then from the sun's surface.
B.
Hydrogen fissions in the sun's core. This energy is radiated outward into convection zones and then from the sun's surface.
C.
Iron fuses in the sun's core. This energy is radiated outward into convection zones and then from the sun's surface.
D.
Iron fissions in the sun's core. This energy is radiated outward into convection zones and then from the sun's surface.

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.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.