its b because the perenpathy is 24
A net population decline resulting from an "excess of deaths over births".
Option: A
<u>Explanation</u>:
Demographic transition is a shift from higher to lower level of fertility and mortality.Rapid development in industrialization and urbanization in 
century resulted into enormous population growth. But decline in early 
century covered many reasons like consequences of two calamitous wars, where Europe suffered large population declination due to battle death and civilian causalities in World War I and II. Hence the acceleration of population growth in 19th century but downfall in 20th is also considered as balance.
Answer:
the answer is a
Explanation:
i took they test and got it right
plus on a venturi mask you use color adapters
People can fly planes into the air and release chemicals into the air if they really need the rain and sometimes a storm will form. Increase in pollution can because all the gas and chemicals that come off the pollution will go into the ozone layer and cause an increase in moisture which could cause rain clouds to form. One last thing is evaporation, condensation, and precipitation. Plants absorb water and moisture then it would evaporate into the air which would form rain clouds, then the rain clouds would have rain in them and then rain would fall out of the clouds.
