Answer:
d. cross-sectional study
Explanation:
In research, a cross-sectional study consists of a gathering of data from a population or a subset of the population we want to investigate at an specific point of time. In other words, the data will give us an idea of what's happening within a group in a particular moment in time.
In this example, the researcher gives 20-year-olds, 40-year-olds, and 60-year-olds a questionnaire. He wants to know if older people are calmer than younger ones. We can see that <u>he wants to know what's happening within this groups (the 20 year-olds, the 40's and the 60's) during this particular time of their life </u>and therefore determine if the 60 year-olds are calmer. Therefore this is an example of cross-sectional study.
He wrote that as time progressed, race discrimination started to gradually decreased as people started to care about social mobility and Global economic structuring.
The difference of treatment that people felt based on race in our current society is way better than it has in the past
hope this helps
Armaments is a military weapon and equipment.
It's the Southern Colonies.
Explanation:
What I'm seeing is cotton, which was grown by the Southern Colonies.
The answer is <span>Bernardino Ramazzini.
</span><span>Bernardino Ramazzini was an italizan Physician that gained his fame in the 1600s.
He noticed that Repetitive movement that being done by Labor workers contributed greatly to the physical pain/muscle constraints that people experienced in the old age.</span>
