Which figures of speech relies on connotation to help a reader understand its meaning

the red coloration of the lungs looks alarming and adds to the overall message that the flu is threatening apex

depends on your school

when i was in high school i took ap biology my senior year and it was the hardest one for me because my teacher finished the material within the first month of school and then went on to doing advanced college level it was horrible. but at a nearby school ap biology was one of the easier aps. also, it depends on what you are interested i like math a lot so ap calculus was easier for me than most but i hate history so ap us government was harder for me than most.

im not entirely sure what you're asking.

harry says he would trade a gold mine for a glass of water.