Answer:
(A). Cross-sectional
Explanation:
A cross-sectional research design is used to collect information on a single variable at a particular time, from different population groups with similar characteristics.
In this case, the research variable being studied is depression, while the individuals are grouped according to ages.
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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Answer: The hardy-weinberg equilibrium is a principle stating that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.
Answer:
It's an example of Demographic trends.
Explanation:
Demographic trend can be defined as the measurable change in the characteristics of a population over time e.g. Change in concentration of a particular ethnic group, age-group, occupation, religion, political view, sex ratio, etc.
Since the population in the U.S. is aging which means there will be an increased need for health care professionals in the future it indicates a demographic trend.
