Question

Which event marks the beginning of the "rising action" in "The Most Dangerous Game"?

Rainsford's dinner with Zaroff
Rainsford trapping Zaroff
Rainsford falling off the yacht
Rainsford being hunted

Answer 1

he event that sparks the main conflict sets the rising action in motion is rainsfords realization that general zaroff means to hunt him at night 

Answer 2

The answer is: Rainsford being hunted

As soon as Rainsford discover that he is going to be hunted at night by General Zaroff and that confreontation and a battle to death is inevitable the rising actions stars.