Air pressure goes down because you need headphones on a plane unless your ear will pop
        
             
        
        
        
Answer:
tolerance
Explanation:
the tropical Forrest is very tolerant to the fire because it can hold it off for a while die to the moisture, but its tolerance slowly decreases when more fire is added because it cant withstand it
 
        
                    
             
        
        
        
C. testable and observable 
        
                    
             
        
        
        
Answer: Because  according to the universal law of gravitation, the effect of the force of gravity decreases as the distance increases. The gravitation force is inversely proportional to the radius or the distance. So, the gravitational force exhibited by the Mars is not experienced by us due to the large distance.
Explanation:
 
        
             
        
        
        
The correct answer is "coarctation of the aorta". In coarctation of the aorta, there is an abnormal narrowing of the aorta, most commonly in the abdominal aorta, which compromises blood flow from going into the lower extremities. Patients with coarctation of the aorta most commonly presents with tachypnea as this is a high pressure congenital heart defect which makes breathing harder for the baby; diminished femoral pulses and poor lower body perfusion as the narrowing compromises blood flow. In physical examination, there will be a narrow ankle-brachial index, or the difference between the pulse pressures of the ankle (lower extremity) and the brachium (upper extremity).