Line of symmetry is just splitting an object in half, if you fold this object onto itself over this line the sides should be equal.
" Give 2 examples and describe the symmetry in as much detail as possible."
If we separated an elephant using reflectional symmetry each side would have 1 ear, 2 legs, half a tail, half a trunk, and 1 eye.
If we separated a lamp using reflectional symmetry each side would have half a lamp shade, half a lamp base, half a light blub.
Hope this helps!