Answer:
They're immune system has become used to it
Explanation:
Student readiness is a student's current level of knowledge, which affects their ability to complete a specific task at a given time. Teachers can determine readiness by giving regular screenings or assessments and can use that information to adjust teaching methods and activities.
A lot of words how to eat how to hit how to give you a kiss how to take a bath.
i have a baby cousin and she's that old and she love's taking bath's eating and talking.