In the study of history, what is one major difference between a theme and a period?

Don’t mind the already marked answer but taking it now

How are the perspectives presented in the excerpts similar? they show the disappointment and fear mission control workers feel when the lunar module develops problems. they show the huge investment of time and energy mission control workers dedicated to the lunar module. they show how mission control workers view the lunar module as if it is the workers' very own child. they show the relief and excitement mission control workers feel when the lunar module lands on the moon.

So-called discourage workers are not counted in the unemployment rate counted in the unemployment rate included in the calculation of the labor force considered unemployed