Step 1: Understanding the Concept:
The principles of development refer to the universal patterns and rules that govern how human beings grow and change over time.
Step 2: Detailed Explanation:
(a) Individual differences: While development follows a pattern, the rate and timing vary from person to person due to genetics and environment.
(b) Continuity: Development is a "cradle to grave" process that never stops.
(d) Predictability: Certain milestones (like sitting before standing) are predictable for all humans.
(e) Coincidence: This is incorrect because development is a systematic and orderly process, not a matter of random chance or coincidence.
Step 3: Final Answer:
Development is a structured process; therefore, saying it occurs by coincidence is a false principle.