Human development stages: Arrange Infancy, Childhood, Puberty, and Adult in the proper chronological order from earliest to latest.

Introduction / Context:
Human growth follows recognizable stages associated with physical, cognitive, and hormonal changes. The task is to order four standard stages from earliest to latest.

Given Data / Assumptions:

• Stages: Infancy, Childhood, Puberty, Adult.
• Typical biological development in humans.

Concept / Approach:
Chronology is based on age ranges: infancy (birth–~2 years), childhood (~2–12 years), puberty (adolescent hormonal maturation), and adult (post-adolescence).

Step-by-Step Solution:
Earliest: Infancy (rapid growth, dependency).Next: Childhood (language, schooling, social development).Then: Puberty (sexual maturation, adolescent growth spurt).Finally: Adult (full physical maturity and independence).

Verification / Alternative check:
Medical and developmental psychology texts present the same ordering across cultures with minor variation only in onset age ranges.

Why Other Options Are Wrong:
They place puberty too early or adulthood before adolescence, contradicting biological sequence.

Common Pitfalls:
Confusing puberty with childhood; assuming legal adulthood equals biological maturation timing everywhere.

Final Answer:
Infancy, Childhood, Puberty, Adult