which undefined term can contain parallel lines?○ line○ plane○ point○ ray

Brief Explanations:

Undefined terms in geometry include point, line, plane, and ray. A line is a 1-dimensional figure that can only contain points along itself, not separate parallel lines. A point has no dimension, so it cannot contain any lines. A ray is a part of a line with one endpoint, also 1-dimensional and unable to hold parallel lines. A plane is a 2-dimensional flat surface that can contain multiple lines, including parallel lines that lie within it.

Answer:

plane