Virus and bacteria are small and can cause problems
Answer:
D - retrieve sticks and balls
Explanation:
operant conditioning is the use of reinforcement or punishment to get the desired behavior. If you reward your dog with a treat every time it retrieves a ball or stick - it will come to associate the retrieval behavior with a positive reward.
If they were not breathing. If they were gagging without anything coming up.
It is maybe true
Hope that helps
~maryahna
