The wedge, screw, and lever are all a. compound machines
b.100 percent efficient
c. simple machine
d. found in the human body ​

Is there a diagram/picture you can provide? it seems this question goes along with a

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

B"hf and f-"  is the correct answer took the test on edgenuity and got it right