Amberlee has realized that her mother does not know the thoughts inside of her head, and so has recently started lying. Amberlee has developed , and is roughly years old.

Amberlee has realized that her mother does not know the thoughts inside of her head, and so has recently started lying. Amberlee has developed theory-of-mind abilities and is roughly four years old.

Explanation:

The ability of a person to understand that all people do not have the same thoughts in their mind starts during childhood and is referred to as the theory of mind abilities. In other words, this theory can be described as the ability of a child to tune in to other people's perspectives. The theory of mind abilities begins to occur when a child starts understanding other people most commonly at the age of four or five.