It may be either serf or manor if none of these helps you than I apologies i'm not very good at history.
The first idea is more reasonable
The reason as to why the ethnologist focus more on non-literate
people on their study because mainly of the reason that they are going extinct.
The non-literate people are being referred to those societies in which their
people does not have the ability of being able to read and write in which the ethnologist
studies and help out of.
Answer:
A secondary source is any source about an event, period, or issue in history that was produced after that event, period or issue has passed.
Explanation:
Aside from a textbook, the most commonly assigned secondary source is a scholarly monograph - a volume on a specific subject in the past, written by an expert.Secondary sources describe, summarize, or discuss information or details originally presented in another source; meaning the author, in most cases, did not participate in the event. ... Examples of a secondary source are: Publications such as textbooks, magazine articles, book reviews, commentaries, encyclopedias, almanacs.
Hope this helps :)
The correct answer is B. Human Development Index.
The Human Development Index (HDI) takes into consideration several different factors in order to categorize nations as to levels of development. Some of the factors they use are:
A) A country's Gross National Income (GNI)
B) Life expectancy
C) Education of citizens (i.e. college degree, years of schooling for average citizen).