Fragen über die Beispielsätze mit, und die Definition und Benutzung von "Soman"

A: I don't know what somen means but 'sanguine' means cheerful and confident

A: Schaue nach der Frage, um die Antwort zu sehen

A: "Nagashi-somen, or flowing somen, is ...".
Add a comma. This is because a comma goes at both the beginning and the end of the side explanation.

"There are roles for each generation;"
There should be no space before the ";".

"There are roles for each generation; young men climb a mountain ..."
The word after the semicolon is not capitalized unless it would be otherwise

"carry them to their home"
The word should be "carry" instead of "carries".
Example:
"Young men climb a mountain and carry the bamboo" is OK
"A young man climbs a mountain and carries the bamboo" is OK

"They cooperate with each other ..."
You need "with" between "cooperate" and "each"

"Kids play in the yard and help adults sometimes."
"help" instead of "helps". "Sometimes" instead of "sometime".

"At the call of the organizer"
Master sounds a bit odd since everyone is part of the same family, and there aren't any maids or servants. Maybe use a different phrase like "eldest", "organizer", or "the head of the family".

"noodle are not the only food to be floated"
Swap "only" and "the".

"people also float chocolates, fruits, and even small toys so that they don’t get bored till the end."
"They" sounds too vague here. "People" or "children" sounds OK.

"Everybody enjoys the nagashi-somen event"
Add 's' to "enjoy".

"because it involves both genders and all generations."
Remove "just", it's grammatically correct, but sounds a bit weird.
Add 's' to "gender".