How matter cycles through our world

There are multiple cycles in our world and here are some examples:

The nitrogen cycle. Nitrogen circulates between air, the soil and living things.

(Nitrogen fixation (N2 to NH3/ NH4+ or NO3-)

Nitrification (NH3 to NO3-)

Assimilation (Incorporation of NH3 and NO3- into biological tissues)

Ammonification (organic nitrogen compounds to NH3)

Denitrification(NO3- to N2)

The carbon cycle. Carbon dioxide circulates between the air, soil, and living things.

(Photosynthesis, Decomposition, Respiration and Combustion.)

Photosynthesis. This process followed by respiration recycles oxygen.

During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

The water cycle.

( Step 1: Evaporation.

Step 2: Condensation.

Step 3: Sublimation.

Step 4: Precipitation.

Step 5: Transpiration.

Step 6: Runoff.

Step 7: Infiltration. )

Explanation:

a chemical reaction

explanation:

explanation:

i think option no d is the correct answer