Answer: Exhaled air consists of 78 percent nitrogen, 16 percent oxygen, 4 percent carbon dioxide and potentially thousands of other compounds.
Explanation: Does this help???
your answer would be A heart attack
Do you need help with this? Cause there’s not much information.
Answer: A frequently used word or phrase or it is a way to convey your thoughts, feelings or emotions.
Example: "a penny saved is a penny earned."
