● It was first created by the Swiss developmental psychologist Jean Piaget.

● The theory deals with the nature of knowledge itself and how humans gradually come to acquire, construct, and use it.

● This theory is also known as a developmental stage theory.

● According to Jean Piaget, cognitive development was a progressive reorganization of mental processes resulting from biological maturation and environmental experience.

Development proceeds from the stage of infancy and continues till death but it is the process that cannot be reverseD. Human development is based on certain principles and reversible is not one of them as development that took place in a human body cannot be replaced or reverseD. Development took place from general to specifiC. General to specific means activity proceeds from general to specific.

Development is a continuous process that goes throughout life. Growth stops at a certain age but development continues till death. It continues right from the moment of conception. Development is a continuous process but growth is at even it takes pace swiftly and later it slackens.

Most of the children between 18 and 24 months of age begin to combine two words to make simple sentences while speaking. Children start to experience complex emotions, including pride in accomplishing a difficult task.

• At about 18 months, children begin to combine individual words to create two-words sentences, like more juice, my truck, etc.

• This kind of speech is called telegraphic speech because like telegrams it consists of only words directly relevant to meaning.

• Children’s two-word sentences follow a common set of rules that are very useful in describing ideas concerning people and objects, their actions, and their properties.

Hence, option B is the correct answer.

Development is a process of change in growth and capability over time due to the function of both maturation and interaction with the environment. It can be explained as the series of overall changes in an individual due to the emergence of modified structures and functions that are the outcome of the interactions and exchanges between the organism and its environment.

• Development proceeds from the centre of the body outward. This is the principle of proximodistal development that also describes the direction of development. This means that the spinal cord develops before the outer parts of the body.

• The child’s arms develop before the hands and the hands and feet develop before the fingers and toes. Finger and toe muscles (used in fine motor dexterity) are the last to develop in physical development.

Hence, option B is the correct answer.