They used faster or slower speeds in the model, and calculated how long it
would take particles to leave the
surfaces.
How does this detail develop the article's central
idea?
А
It shows how scientists found out how long to
wash your hands.
B
It shows why scientists wanted to study how
long to wash your hands.
C
It shows how long it took scientists to find out
how to best wash your hands.
D
It explains a past study used to find out how
to best wash your hands.

there is no poster. if you add a poster then we can answer.

yes its like krisnis like in the air force .

: b : o   : 0 ; b : - )  

: b: b: b: b: b: b: b: b: b

the excerpt from chapter 2 of "animal farm", by george orwell that is an example of foreshadowing is "these three (snowball, napoleon, and squealer) had elaborated old major's teachings into a complete system of thought to which they gave the name of animalism." animal farm is an allegory of how czarist russia developed into communist russia with all its corruption. old major's teachings represent marx's theories turned into communism, animalism, by the three pigs. this foreshadows the oppression and corruption that will follow this revolt.