What is NOT one of four factors that guide a child’s development?

a. Nature
b. Existentialism
c. Nurture
d. The child’s own activities

b. Existentialism

To determine which of the options is not one of the four factors that influence a child's development, we need to understand what each option represents. The four factors that typically guide a child's development are commonly known as "nature, nurture, the child's own activities, and interaction with the environment."

a. Nature refers to the genetic and biological factors that influence a child's development.
b. Existentialism is a philosophical perspective that focuses on individual existence, freedom, and personal responsibility. However, it is not typically considered one of the four factors that guide child development.
c. Nurture refers to the environmental factors, such as parenting, education, and social interactions, which contribute to a child's development.
d. The child's own activities refer to the active role a child plays in their own development through actions, exploration, and personal experiences.

Therefore, option b, "Existentialism," is the answer because it is not one of the four factors that guide a child's development.

b. Existentialism