What is the name of the bolded part of this figure?

line BD

point D

ray BC

line segment BE
A two dimensional figure. A line with arrowheads at both ends passes through three points. From left to right, the points are labeled A, B, and D. Part of a line in bold begins at point B and ends at point E below the line. A ray begins at point B and rises above the line to pass through point C.