Final answer:
Flexible individual differences can change or adapt over time or in different situations, while fixed individual differences remain relatively stable or consistent.
Step-by-step explanation:
The distinction between flexible and fixed individual differences:
Flexible individual differences refer to traits or characteristics that can change or adapt over time or in different situations, while fixed individual differences are traits or characteristics that remain relatively stable or consistent.
For example, a person's level of extraversion can be considered a flexible individual difference because it may vary depending on the social context or environment. In contrast, intelligence is often seen as a fixed individual difference because it tends to remain relatively constant throughout a person's life.