Public wi-fi should never be used when you are:

Although public wi-fi has become almost universally available, it is important to remember that it should not be used at all times. There are times when using public wi-fi can be dangerous. One of the most important dangers of using public wi-fi is the fact that the connection is not always secure. Therefore, public wi-fi should not be used when we are entering private or secret information such as credit card or bank information.

answer: to inform

explanation: the red death is an exciting passage, but also in some ways scary, so it is not to amuse. the red death is far in the past, so it is not to warn.

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