Final answer:
Option (2), Axel is in the stage of generativity vs. stagnation, positively contributing to society and feeling accomplishment from his work, as per Erik Erikson's psychosocial development theory.
Step-by-step explanation:
Axel, at 50 years old with 20 years of experience as a chef who takes great satisfaction in his work, is most likely at the stage of generativity vs. stagnation in Erik Erikson's psychosocial stages of development.
This stage typically concerns individuals in middle adulthood (ages 40-65) who focus on making a mark on the world through creating or nurturing things that will outlast them, expressing this through raising children, being productive at work, and being involved in community activities.
Axel is experiencing generativity, which means he is effectively contributing to society and feeling a sense of accomplishment from his work.