A) Psychology is the scientific study of the mind and behavior. It investigates how individuals think, feel, and act, encompassing both conscious and unconscious processes.

Here are the answers to question 1:

a) Psychology is the scientific study of the mind and behavior. It investigates how individuals think, feel, and act, encompassing both conscious and unconscious processes.

b) Developmental psychology is the scientific study of how and why human beings change over the course of their life. It examines growth, change, and consistency in physical, cognitive, and socioemotional development from conception to death.

c) The main difference between growth and development is that growth refers to quantitative changes, such as an increase in size, height, or weight, which are largely physical. Development, on the other hand, refers to qualitative changes, involving an increase in skills, abilities, and complexity, encompassing both physical and psychological maturation.