If you improve the of the muscles to extract oxygen from the bloodstream
to produce energy, you improve your cardiovascular endurance.
a) Leisurely
b) Buoyancy
c) Capacity
d) Vessel

Major sources of stress, such as a death or divorce, problems in family relationships, job loss, school, and substance abuse, can trigger or aggravate some mental disorders in some people. but not everyone who goes through those things develops a mental illness