Why high BP medicines are many a times diuretics?

Sometimes, we feel good even without taking any medicines and sometimes we need to consult doctor and take regular medicines in sickness. Why is it so?

IF the side of a square is tripled,how many times its perimeter will be that of the original square.

Answer in short: Why are many species of animals and birds getting extinct?

Answer the following questions: Why are many images obtained in a kaleidoscope?

IF the side of a square is tripled,how many times its perimeter will its area be as compared to the area of the original square ?

You must have read the news about many deaths due to poisonous liquor. Why does it happen?

Why we respire all the time?

Why are many species of plants and animals getting (becoming extinct ?

Why are many species of plants and animals getting (becoming) extinct?

If the length and breadth of a rectangle is doubled, how many times will the perimeter of the new rectangle be that of original rectangle ?