Answer:
If the choices are as follows...
A.Extreme Weather Events
B.Shortage of potable water around the World
C.More frequent heat waves and droughts
D.All of the above
Explanation:
Then It should be D.
Explanation:
The question is incomplete.
However a standard method to dertmine how workload effects health is developed and is called Harvard step test.
The Harvard Step Test is a fitness test method devised to measure heart and respiratory fitness. It is done by giving some work load to a person for 5 minutes (normally) and then noting his heart rate afterwards in some intervals.
Formula is;
Fitness Index = (100 x test duration in sec) / (5.5 x pulse count between 1 and 1.5 mins)
I would say it's the result of a slightly negative charge on the hydrogen end of water.
