Which of the following is not one of the four importance of agriculture? 1.Raw material 2. Health
3. Recreation
4. Specialized Jobs

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation:

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.