James suffers from atherosclerosis a condition that causes artery walls to harden and thicken atherosclerosis restricts blood to flow to organs and tissues the restricted blood flow increases blood flow pressure in which system does atherosclerosis develop

the answer to your question is b

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.