Answer:
The change in demographics observed in developed countries in the twenty-first century was falling birth rates and longer life expectancy. Option B is correct.
The world population is growing further slowly than it used to since birth rates have been reduced in numerous countries. At the same time, life expectancies have increased considerably.
In more than 80 countries, the birth rate is below the level of 2.1 children per woman.
If you’re referring to the order in which they occurred, it’s 2 then 1 then 3 then 4
Explanation:
Primary sources are evidence about what happen in that time, the person's evidence is primary because that person was there.
Secondary are like when somebody tells you something that he heard but he wasn't there.
Answer:
option 2: material created after the period of time in an event occurred
Explanation:
first we need to know what primary source is
a primary source may be someone or something with a direct knowledge of the event or situation.this is the most reliable sourceof information about an event or situation obtained directely from the event
secondary source is obtained from the primary source hence being obtained after the period of time an event occured.it is information derived from the primary source
