The seaport city that was the scene of thousands of allied troops being rescued by boats was called
paris
hamburg
dresden
dunkirk

Dunkirk

Step-by-step explanation:

Dunkirk is a coastal city in France, where the allied troop were gathered and cornered by the German Army, the civil boats left Britain and were sent to the dunkirk shores to transport the allied army all the way back to England where they were safe again, if this operation hadn´t take place most of that army would have died because they were already surrounded by the enemy and the allied forces would have been largely decimated.

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.

it’s the first one your welcome