Development is the integration of physical, psychological, and social aspects ofhuman beingis a process of change throughout the life span, and that process of change includes the acquisition of a high degree of differentiation, complexity, and efficiency of function, as well as a decline in structure and function.
human beingdevelopment begins with conception,deathThe project will continue through to thehuman beingthrough a process of change.environmentand influence each other, and through the differentiation of various functions and structures, they are further integrated to become more capable and more complex. These functions and structures undergo quantitative and qualitative changes at different rates and in different patterns. Also,human beingdevelopment is influenced by environmental factors in addition to genetic factors, resulting in individual differences.
Development has similar and related terms such as growth, maturation, and learning. In general, morphological changes, such as an increase in height or weight, are referred to as growth, while functional changes are often referred to as development. However, since morphological and functional changes are inherently interrelated and cannot be considered separately, the two terms are often used side by side, as in "growth and development. Maturation refers to the process by which an individual organ or an entire organism reaches morphological and functional perfection, while learning refers to the relatively permanent process of behavioral change that results from repeated exposure to the same or similar situations. These maturation and learning influence development.

References
1) Funashima, Nanomi (Author): Human Development for Nursing, 4th edition, Igaku Shoin, 2011.
(2) B. N. Newman, F.R. Newman (Author) / Mamoru Fukutomi (Translator): New Edition of Lifelong Developmental Psychology - Human Life and Its Potential According to Erikson, Kawashima Shoten, 1988.
(3) Shun Kujiraoka (Author): Construction of Relational Development Theory: An intersubjective approach, Minerva Shobo, 1999.