Final answer:
The correct answer is option 1. An interbusiness alliance or enterprise group in Japan that resembles a fighting clan in which business families join together to vie for market share is called a keiretsu.
Step-by-step explanation:
An interbusiness alliance or enterprise group in Japan, that, in the words of one observer, "resembles a fighting clan in which business families join together to vie for market share" is called a keiretsu.
Keiretsu is a Japanese term that refers to a group of companies that are interlinked through shareholdings, cross-shareholdings, and business relationships.
These alliances are often centered around a core company and include suppliers, distributors, and other related businesses. Keiretsu members support each other financially and provide mutual assistance in areas such as financing, research and development, and marketing.