What type of irony is this??

As Henry and Lenina fly over the Crematorium, Lenina says, “What a marvelous switchback!'” and laughs. The switchback, we learn, is the hot air created by the burning of bodies.

Which piece of evidence would best support reason #1? othe history of using animals for research extends asfar back as 322 bce, when early greek physician-scientists, such as aristotle and erasistratus,performed various experiments on living animals.animal research played an essential role in thedevelopment of herceptin and tamoxifen, twomedications that have already saved the lives ofthousands of women who have been diagnosed withbreast cancer.even those who believe in testing on animals when it is hnecessary for vital medical research practice what isknown as "the 3 rs-reduction, refinement, andreplacement to reduce the number of animals usedfor testing.biologists believe that chimpanzees share at least 98.4percent of the same dna as humans and gorillas shareat least 97 percent, making primates a popular andlikely choice for the testing of products intended for humans

Give a simile of how u look or act. yes it can be you whoever is reading this (but if u wanna do me then im mostly shy and nervous at school)

What did mark twain contribute to the history of the novel? select all that apply.