All of the top 10 causes of death in developing countries are preventable or treatable (early twentieth century). Globally, water-borne diseases are the leading cause of death in children below five years, only to be outranked by the childhood mortality rates from acute respiratory infections rank first. Around the world, water supply and satisfaction facilities are rapidly deteriorating and currently are operating at a fraction of their installed capacity.

A. 1st
B. 2nd
C. 4th
5. 3rd

if you're asking what comes out, it's steam.

answer: they produce more slow than unicellular organisms.

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.

the objects have the same charge is correct.

nathan lee