No figure is changed by a translation so the last part of the question is irrelevant.
Any figure with a horizontal line of symmetry will not be changed by a horizontal reflection.
It will be as you term it 'horizontal stretch' in which the figure is enlarged or reduced in size.
This is a transformation which could be a rotation, translation or reflection.
The angles have the same measure. In the reflection the order of the angles are changed from clockwise to counterclockwise.
It is moved across the plane. Its size or orientation are not changed.
Figures are congruent if and only if they are related by a translation, reflection, or rotation, or some combination of these transformations.
It will be as you term it 'horizontal stretch' in which the figure is enlarged or reduced in size.
the difference is that in translation you slide the figure and in reflection you reflect the figure across the reflection line :)
translation
A translation, a reflection and a rotation
flirtation
It is called a Flirtation.
rotation, translation, and reflection
This is a transformation which could be a rotation, translation or reflection.
It is a translation of the shape on the coordinated grid
The angles have the same measure. In the reflection the order of the angles are changed from clockwise to counterclockwise.
A transformation is moving or changing the shape of a figure on the Cartesian plane by a translation, by a reflection, by a rotation or by an enlargment
It could be a reflection with the mirror line outside the figure; it could be a rotation with the centre of rotation outside the figure; or it could be a translation.