The phrasal verb "call for" is used more often in formal contexts compared to many other phrasal verbs, though it is not out of place in informal speech. It typically means to demand or require something, often in a public or official manner. For example, a new policy may 'call for' increased security measures, or a situation might 'call for' a particular action. In addition to its use in declarative contexts, it's also found in discussions relating to problem-solving or planning, highlighting necessity or need. It's common in business, legal, and formal writing, indicating an official or strong request or requirement. It can also imply that something justifies or deserves a response due to its nature or circumstances. Its relatively formal flavor makes it less common in casual everyday conversations unless the speaker is emphasizing a need or action.
B1
PreIntermediate
1. To demand or request something publicly.
The workers are going to call for a strike if their demands are not met.
Environmentalists call for stronger regulations to protect the ocean.
2. To require something as necessary or appropriate.