Primary sources can be described as those sources that are closest to the origin of the information. ... Secondary sources often use generalizations, analysis, interpretation, and synthesis of primary sources. Examples of secondary sources include textbooks, articles, and reference books.
Credit to the internet.
The correct answer is <span>b. birth rate
This period was called the Baby Boom period and people born in it are Baby Boomers. The 50s experienced a massive growth in population.</span>
Answer:
exploration
Explanation:exploring is to dicover for instance Cristopher colombus set out to explore or discover.
B. to create a surplus of food to be used as a barter