Select the most appropriate meaning of the given idiom.

To sound a red alert

To make alert

The most appropriate meaning of the idiom "to sound a red alert" is to make alert. This idiom is used to describe a warning that something dangerous is happening or about to happen. It is often used in military or security contexts, but it can also be used in other contexts, such as when there is a natural disaster or a public health emergency.

The other options are not as accurate or appropriate. To make peace means to end a conflict or to come to an agreement. In disorder means in a state of chaos or confusion. In spite of risks means to do something even though it is dangerous or risky.