Answer:
According to Freud, Brit is in the oral stage of development.
Step-by-step explanation:
Freud theorized that there are 5 stages of psychosexual development.
The oral stage is the first one, which goes from birth to around 18 months of age. In this stage, the main point of pleasure is the mouth and it is the way the child learns about the world and his/her surroundings. This is why babies tend to put everything in their mouths.
In this case, Brit is exploring and putting everything in his mouth, biting, chewing and sucking in order to understand the world around him.