(a) An electrostaic field line is a continous courve. That is a field line cannot have sudden breaks. Why not ?
(b) explain why two filed lines never cross each other at any point.

Explanation

(a) An electrostic field line is a continous curve, because it represents the actual path of a unit positive charge, which experiences a contiuous force. It cannot have sudden breaks because the moving test charge never jumps from one position to the other.
(b) NA