How did the discovery of an effective vaccine by Louis Pasteur lead to the growth of the Europe's population?

I believe the answer is
Vaccines reduced the number of diseases in the world, so fewer people suffered illness.

I hope this helps :)

The discovery of an effective vaccine by Louis Pasteur lead to the growth of Europe's population because the study of microorganisms and how they lead to fermentation also spurred the growth of other industries.

Due to the invention or discovery of Louis Pasteur, industries such as pasteurization, beer production, wine production silk production, and the production of drugs that helped to cure diseases such as rabies and anthrax expanded thus creating an increase in population.

It is to be noted that Louis Pasteur's discovery was in the year 1881.

Learn more about  Louis Pasteur at:

link

the california missions began in the late 18th century as an effort to convert native americans to catholicism and expand european territory. there were 21 missions in all, lasting from 1769 until about 1833.   the missions were built by the spanish starting in 1769 in order to “colonize” the territory of alta california. so the missions were important because they were the means of settling california. it also wanted to keep other european countries out of alta california. building settlements along the coast would them meet these goals. missionaries wanted to convert the indians to the roman catholic faith. california indians did much of the work to build missions.

to extend a country’s power and influence