call for
phrasal verb.to say publicly that something is necessary or should happen.
phrasal verb.to publicly demand or require a particular action or quality; often used in political or professional contexts to indicate necessity.
“The protesters call for a change in the law.”
“After the accident, many local residents began to call for better safety measures at the crossing.”
“The opposition party issued a statement to call for an immediate investigation into the government's handling of the crisis.”
usually followed by a noun representing a required action, quality, or person.
contrast with 'demand' which is more aggressive; 'call for' is often used in news headlines and formal requests for social or political change.
the preposition 'for' is the only correct particle to express necessity in this context.