is this primary source or secondary source The main cause of the fall of the Byzantine

Empire was the continuous attacks from
different external groups over time. The Seljuk
Turks and the Ottoman Empire invaded the
Byzantine Empire, which caused a big problem.
They threatened the empire's land and made its
military and economy weaker. As more invasions
happened, the Byzantines had a hard time
keeping control of important areas, which
caused their empire to slowly become weaker.
Moreover, these attacks made the Byzantine
Empire use up a lot of their money and army to
protect themselves, which made them more
susceptible to problems within their own
government and economy like political chaos and
lack of growth. In the end, the constant
attacks from outside forces were the most
important reason for the downfall of the
Byzantine Empire

This is not a primary source. It is a secondary source because it is an analysis or interpretation of historical events, rather than a firsthand account from someone who experienced those events.

This passage seems to be a secondary source. It provides an analysis and interpretation of historical events rather than directly presenting firsthand accounts or original documents.

This text appears to be a secondary source. A primary source is a firsthand account or evidence of an event. It is created or recorded by someone who experienced or witnessed the event. Examples of primary sources include original documents, letters, diaries, photographs, speeches, and interviews.

In contrast, a secondary source analyzes, interprets, or discusses primary sources. It is usually created by someone who did not directly witness or experience the events being discussed. Secondary sources often rely on primary sources for their information.

In the given text, the information about the fall of the Byzantine Empire is presented and analyzed. It provides an interpretation of the primary sources that documented this historical event. Therefore, it is considered a secondary source.