A example of an expression or word mnemonic is

such as Pemdas - please excuse my dear aunt sally

Explanation:

A great example of an expression mnemonic that can help a student in an anatomy class to remember the names of the bones in the wrist is this one: Sally Left The Party To Take Cathy Home (Scaphoid, Lunate, Triquetrum, Pisiform, Trapezium, Trapezoid, Capitate, Hamate).

Another one that can help recall the names of the Great Lakes is this one:  Some Mice Hate Eating Onions  (Superior, Michigan, Huron, Erie, Ontario).  

b.

explanation:

he is racist

"oh, lets coppy china and build a great wall around bla bla bla.that way,we wont lose out to other countries." in the end, he did not build anything

they charge for servic mark me brainliest