Which of the following are typical brain changes that occur during infancy and childhood?

The given question is incomplete. The complete question is as follows:

Which of the following are typical brain changes that occur during infancy and childhood?

The number of synaptic connections increases greatly.

Some parts of the brain nearly double in size.

Unneeded brain cells are purged over time.

All options are correct.

Explanation:

The human brain do not get fully developed at the time of birth. Different physical and structural changes occur that are important for the changes in the brain structure.

The size of the brain gets increases and thinking ability increase with the age. Synaptic connections that are present in the brain nearly increases and their number increases. The damaged cells and the cells that are not required are removed from the brain.

Thus, all the options are correct.