Final answer:
The term describing generalized traits for a group is 'stereotype,' which is an oversimplified belief that fails to consider individual differences. Option 1 is correct.
Step-by-step explanation:
The term used to describe traits, characteristics, and mannerisms supposedly shared by all the members of a group is stereotype. A stereotype is an oversimplified generalization about groups of people that doesn’t take individual differences into account. These can be based on race, ethnicity, age, gender, sexual orientation, and nearly any other characteristic. Although some stereotypes can be positive, often they are negative and can lead to biased attitudes and behaviors. Holding stereotypes and harboring prejudice may lead to injustice, such as discrimination, which encompasses the actions taken based on prejudice towards an individual or group.