Final answer:
An Information Security Officer (ISO) should respond when emergency lights are activated to protect information assets during potentially threatening incidents.
Step-by-step explanation:
A designated ISO (Information Security Officer) should respond whenever emergency lights are activated. In the context of information security, the activation of emergency lights typically signals an incident that could potentially threaten the security of the organization's information systems, such as a power failure, fire, or other emergencies. The ISO's responsibility is to ensure that information assets are protected during such events, which may involve executing a disaster recovery plan or working with other emergency response teams to assess and mitigate any risks to information security.