Social ecologists know that people who report living in neighborhoods with high levels of crime and civil disorder become suspicious and mistrusting. Some residents become so suspicious that they develop a(n) , in which the outside world is considered the enemy out to destroy their neighborhood.

Siege Mentality.

Explanation:

Siege Mentality can be defined as a mentality in which a group of people or society thinks themselves to be victimised and the need to defend. The term siege mentality is derived from the real experiences that the military uses to defend during the time of sieges.

In this mentality, the people start to develop a notion that the people around them are hostile towards them and thus there's a need on their part to defend themselves.

In the scenario, in which people are surrounded by the neighbourhoods of high levels of crime and civil disorder are prone to develop siege mentality. A mentality of being threatened by the surroundings and need to defend themselves.

So, the correct answer is siege mentality.

a would be the answer

answer; the president uses mass media to gain support for policies;