Nakita is an african-american mother with four children who has had difficulty finding housing in a safe community. lisa, her social worker, suspects that racial discrimination is involved and takes nakita to sites that she has previously screened for availability. in this case, lisa is acting as an:

The correct answer is "advocate".
Lisa acts as an advocate for Nakita's family in hopes for looking a safe community for them to live in, Lisa shows that she is an advocate in terms of supporting african-americans to live peacefully, just like normal human beings. She shows that racial discrimination should not be a barrier in order for others to live in safe communities.