Boson corp., an american software development company, wants to expand its business in international markets. therefore, it buys property in greitch, a south asian country, and sets up a production facility despite the high costs involved. in this scenario, boson corp. is most likely involved in

Direct investment

Explanation:

Direct investment means investment made by a company in some other country that is not the native, to acquire the physical assets in the country or to develop the ownership of the company in the region.  

Here the Boson corp has bought a land i.e the physical asset in South Asian country (i.e in a country where is not based ) to expand its business.

Hence, the company is involved in direct investment.