Which one of the following statements is not correct?

Human development follows certain well-established principles that explain how individuals grow and change over time physically, cognitively, socially, and emotionally.

Key Points

•  Rate of development is uniform is the statement that is not correct. In reality, the rate of development is not the same for all individuals or even across different areas within the same individual. Some children may develop language skills early while taking more time in motor development, and vice versa. 
• Each phase of development has its hazards is true, as every stage, whether infancy, childhood, or adolescence has unique risks like emotional insecurities, learning challenges, or social pressures.
• Development is spiral and not linear is correct; it means children often revisit earlier behaviors in more mature ways, and development involves progress with possible regressions.
• Development proceeds from general to specific is also valid, referring to how infants develop broad movements before refined actions like waving arms before being able to grasp a spoon.

Hence, the correct answer is rate of development is uniform.