Concept:Individual differences mean that no two children are exactly alike in abilities, interests, or behavior.
Explanation:The statement "Two children have no common abilities" highlights that every child is unique.
This idea was given by Hurlock.
She emphasized that individuals differ in physical traits and also in their mental and behavioral characteristics.
Other psychologists have different views: Crow and Crow focused on teaching individuals, Sorenson defined social growth, and T.P. Nunn spoke about education for complete individuality.
Only Hurlock directly stated that no two children share identical abilities.
Answer:Option A – Hurlock