Which of the following is the number one cause of preventable death in the u. s.? a. the flu b. heart disease c. aids d. asthma

i believe the answer would be negative peer pressure

during longer space exploration trips, crewmembers may develop vision impairment risks and short-term cardiac atrophy or a decrease in the size, strength, weight, and activity of the heart during space flight because they can experience microgravity. in addition, the long-term medical condition is loss of bone mineral density and radiation exposure.