Sonali says that the definition of a line segment is part of a line. Is Sonali correct? If not, what is the error? This definition is correct. The definition is missing the two points. The definition is missing "continuous" This is a definition of something else.

Sonali is not correct. The error in the definition is that it is missing the two points that define the line segment. A line segment is a part of a line that is defined by two distinct endpoints.