Answer:
Sociologists try to keep the definition open to encompass all types of people who are emotionally close to each other.
Explanation:
Sociologist define family as individuals who are emotionally bonded, related by blood, legal ties or sexual mating.
Option 1 is wrong because people who walk by each other on the street are not classified as family.
Secondly, people who live in the same house may not necessarily br family, they could be room mates.