What is the meaning of なり?

the classical copula “to be”, equivalent to modern Japanese である (de aru) or (da), or adjective particle (na)

Used when giving an example, without the implication that it might be the best or the only option

... or ...

A modal auxiliary verb indicating hearsay or conjecture based on what is heard: it sounds like; it is said that

生り: bearing (of fruits)

成り, 為り: promotion

Source: wiktionary.org