What are prosthetics? How can they help? How are engineers trying to make them
better?

a. ethnic minorityb. raceb. raced. stereotypea. assimilation

Explanation:

An ethnic minority, by definition, is a group that differs in racial, national, cultural or religious characteristics from the dominant group in a society.A race is a group of people who share specific physical, inherited traits that differentiates them from the rest of the society.A race or ethnicity is also characterized by its cultural, national, religious or linguistic origin.A stereotype is a widespread social construct or conviction about certain aspects of a particular group. It is an over generalized belief about a group.In sociology, assimilation refers to the social and cultural integration or acceptance of a minority or marginalized group into society.