The answer is obsessive-compulsive disorder. Compulsive and usually unwanted thoughts and actions (rituals) are the common features of the disorder. Although OCD is usually associated with repeating the actions over and over, such as obsessive hand-washing or having to flick a light switch a certain number of times, many people who suffer from OCD struggle with frequent unwanted thoughts and images.
Answer:
Oxygen.
Explanation:
Carbon monoxide binds to the hemoglobin, preventing oxygen from being carried by the red blood cells.
Answer: cardiovascular Endurance
Explanation: