Final answer:
The response to the 9/11 attacks, where many individuals provided aid and support to New York City, is categorized as a tend-and-befriend response.
Step-by-step explanation:
After the terrorist attacks of 9/11, the nationwide response where many people went to New York City to lend aid is an example of b) a tend-and-befriend response.
This behavior is part of a stress response system that is characterized by seeking social support and nurturing behaviors to cope with stressors. The outpouring of support included people from across the country donating resources to charitable groups, economically supporting the city, and volunteering with community organizations.
Displays of patriotism, volunteering, and donations to relief efforts like the American Red Cross were prevalent. The nation saw an enormous show of altruism and heroism, with first responders and ordinary people stepping up to help during the crisis.