Final answer:
The turning point that can change the trajectory of a person's life is a climax.
Step-by-step explanation:
A turning point that can change the trajectory of a person's life is a climax. In literature, the climax is often described as the "turning point" of a story. It is the incident that allows the main conflict of a story to resolve and characters to solve a problem. The climax can take many forms, such as an epiphany the protagonist has about themselves, a battle between the protagonist and antagonist, or the culmination of an internal struggle.