Some hummingbirds in Anna's garden are faster than others. Some consume more nectar and fewer insects than others. Some have longer beaks and tongues. What is the best explanation for why these differences are important?

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.

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

when it is at an intermediate population density