(a) ED and AC are distinct lines that intersect.
the line ED and line AC intersect at point B, so the above statement is true.
(b) A and C are distinct points that are collinear.
points A and C lies on the same straight line, so they are collinear.
(c) Another name for plane X is plane ABF.
points A,B and F all lies on the same plane, so those points can be used to name the plane.
(d) A,B,C and F are distinct points that are coplanar.
The points A,B,C and F all lies on the same plane, so they are coplanar.
All the above statements a to d are the true statements needed