Question

Select input or output for each of the following items. a letter to a congressman a picket line of union members demanding new rules a Veteran's Day parade voting a tax increase a new super highway a law against frisbees a parent-teacher resolution to ask the state for new books

Answer 1

a letter to a congressman- Input
a picket line of union members demanding new rules- Input 
a Veteran's Day parade voting a tax increase a new super highway- Input
a law against frisbees- Output
a parent-teacher resolution to ask the state for new books- Input.

Requests/demonstrations = input.
Laws and responses from the government are outputs.