are experienced correctional officers who are used to temporarily replace officers who are sick or on vacation or to meet staffing shortages.

answer; the sound of a train whistle makes a woman think of an old friend; //

the smell of grass makes a by feel that spring is the best; (apex);

answer; graduated cylinder;

an important point to remember about correlation is that while there is a _statistical_ relationship correlation does not equal _causation_

the first answer is: statistical

the second answer is: causation