it's a learning process called classical conditioning
basically it's broken down into I think three different sections. and it's made to help people adjust to for example trauma and in the classroom with students having a hard time reading out loud they have this program called the Pavlov theory that they have tried to incorporate to help a child be more ease and comfortable in their surroundings
Answer:
wall
Explanation:
It is composed of peptidoglycan. The wall gives the cell its shape and surrounds the cytoplasmic membrane, protecting it from the environment.
Oxygen.
Oxygen was fatal when organisms started using photosynthesis, this event was known as the Great Oxidation Event.