Select the most appropriate option to fill in blank number 1.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. custom.
The word "custom" refers to a traditional practice or habitual activity that is commonly followed by a particular group of people or society. In this context, it refers to the tradition or practice of hunting with falcons.
The sentence is talking about a common practice in Europe during that time, specifically the act of hunting birds with falcons. Since this was a regular activity or tradition, the term "custom" is the most appropriate.