The easiest type of business to start is a sole proprietorship

There is no correct answer.

Explanation:

Different circumstances regarding how you operate your company and what kind it is.

Also, with sole proprietorships, it may be hard to manage liabilities, as the owner is personally responsible for any liabilities. It is also hard to procure funding for your company.

However, it is simple to incorporate and allows for high flexibility, which may be what you mean by "easiest type ... to start".

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.