Explain the relationship between digestive system and circulatory system and respiratory system

Digestive system digest things circulatory is the one that moves the blood and the respiratory helps with the lungs I think the other 2 I know though

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