Answer/Explanation:
In the study of history as an academic discipline, a primary source (also called original source or evidence) is an artifact, a document, diary, manuscript, autobiography, a recording, or other source of information that was created at the time under study. It serves as an original source of information about the topic. Similar definitions can be used in library science, and other areas of scholarship, although different fields have somewhat different definitions. In journalism, a primary source can be a person with direct knowledge of a situation, or a document written by such a person.
Answer:
As per the psychologists (Developmental psychologists), the development of an individual or child occurs in a orderly or sequential way and in different areas simultaneously. There are various and distinct stages of development which are featured by qualitative differences in behavior of Individuals.
They followed animals and they traveled in teepees and hunted them
One of the major federal reactions to the terrorist attacks of 11 September 2001 was the establishment of a cabinet-level position merging 22 agencies into one agency called the Department of Homeland Security.
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What is the role of the Department of Homeland Security?</h3>
The dedication and resolve of Americans across the country in the wake of the September 11th attacks gave birth to the U.S. Department of Homeland Security (DHS) and its goal to ensure the safety of the American people.
The Department has mobilized this collective vision in the many years following the September 11th attacks to counter new and evolving threats to the Homeland. To do this, they are fostering a "culture of relentless resilience" throughout the country in order to solidify security against impending dangers, repel assaults, and quickly bounce back.
They address systemic threats, boost security baselines globally, and add redundancy for vital systems that support our wealth and way of life. Perhaps most significantly, they are developing alliances to advance public, private, and global cooperation as well as crowdsourcing solutions that outrun the goals of our enemies.
Learn more about the Department of Homeland Security here:
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