What is the term for the period of sleep that is found in older children and adults and is associated with dreaming?

Rapid Eye Movement (REM)

I’m going to guess these are the choices: a) recreational skiing developed in the mid-19th century b) it was originally invented as a way of getting from place to place in snowy regions c) downhill skiing is currently the only common form of the sport d) it mostly evolved from snowshoeing- if that’s the cases then the answer would be c) downhill skiing is currently the only common form of the sport

Dialect is probably part of the answer