Final answer:
Stable emotional development is not a reason for fluctuations in self-image during early adolescence; instead, this period is characterized by unstable emotional and psychosocial changes.
Step-by-step explanation:
The option that is not a reason that early adolescents might experience fluctuations in self-image is c) Stable emotional development. During adolescence, individuals undergo a range of changes including puberty-related physical changes, increased sensitivity to social comparisons, and significant peer influence. However, this period is typically marked by unstable emotional development rather than stable emotional development, as adolescents are navigating new social dynamics and personal identities, making option c) the incorrect choice regarding fluctuations in self-image.