Why do workers rub special mud
on baseballs?

Mud rubbing baseball is mud used to fix the ball in baseball games to give the pitcher better control and a stronger grip on the ball

Before all major- and minor-league baseball games, an umpire or clubhouse attendant rubs six dozen or more balls with the mud to give them a rougher surface, to make them easier for pitchers to grip, and to comply with MLB Rule 4.01(c).His Lena Blackburne Baseball Rubbing Mud is applied to every baseball used in a big-league game, to help pitchers grip the ball better as they launch it toward home plate. “When fresh baseballs come out of the box, they're quite slick. ... The magic mud soon spread through baseball's American and then National leagues.Apr 2, 2017

Explanation:

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to save the day, harry must get past a scary three-headed guard dog.

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.