In which situation would a writer most likely use informal language

What time of day would you expect to see a first quarter moonrise?

Critical thinking questions what factors led to the creation and implementation of operation reinhard? how did the residents of the ghettos respond to mass deportations and what occurred when the residents realized what happened to those deported? what did rudolf hoess’s testimony at the end of the war suggest about the final solution and planned deportation and resettlement? how did operation reinhard differ from earlier nazi actions and how was it similar? was resettlement seriously considered and why was it not used?

The development of new inventions in the field of space travel seemed rapid. how does the word rapid function in a sentence?