#1 Describe and explain the "Cycle of Empires."

Explanation:

The Five Phase Life Cycle of Empires - a model of the growth and ... the borders of the new empire are well defined and well defended, ... The stage of decline and legacy can be described as the evolution of multi¬-polarity.The Life Cycle of Empires and America's Destiny ... More generally, what are some common features of an empire's culture in its declining period? ... usefully summarizes the former's work) describe developments such as the following.The Life Cycle of Empires and America's Destiny. By Eric V. ... for Survival,” he described a general pattern fitting the history of some fallen empires.

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: