Solution:Tourists visiting high altitude areas such as Manalior Mansarovar, experience altitude sickness, Its symptoms include nausea, fatigue and heart palpitations. This is because in the low atmospheric pressure of high altitudes, the body does not get enough oxygen.But, gradually one gets acclimatised and stop experiencing altitude sickness. The body compensates low oxygen avail-ability by increasing red blood cell production, decreasing the binding affinity of hemoglobin and by increasing breathing rate.