A group of ideas, assumptions, and generalizations that interpret and illuminate observations that have been made about human growth is referred to as a theory.

The correct answer is: Developmental.

Explanation:

In psychology, Developmental theory can be defined as such a theory in the which the period of growth of a child from infant to adult is divided into multiple stages.Thereafter,  various qualitative and quantitative parameters are used to study the physical, psychological, emotional, cognitive, intellectual, behavioural, physiological development of the child. This is done to ensure that proper and regulated growth occurs at every stage of development of the child and that too in an ordered manner.

Hello we have the same names lol.biology is the study of living beings , that is, all plants and animals including humans.