Response means a reaction to something. It can be:
* A spoken or written answer: "I asked her a question, but she gave no response."
* An action or behavior that is caused by something else: "The government's response to the crisis was swift."
* A change or effect that results from something: "The drug had a positive response on the patient."
For example:
* Response to a question: "What is your response to the allegations?"
* Response to a stimulus: "The plant showed a rapid response to the sunlight."
* Response to a crisis: "The company's response to the data breach was inadequate."