This event would have a huge impact on those hiding in the annex.
They are hiding in Holland, so a British invasion would directly impact them. While they'd welcome the British removing the Germans, they would have to contend with Germany defending their territory first.
To that end, the Germans treated to flood Holland. If so, the members of the annex would have to decide whether to stay or flee. Either one could be deadly. The Germans might also forcibly evacuate Holland. If that were the case, they would again have to decide whether to continue to hide in an abandoned city or leave and risk being caught by the Germans.
Ultimately, they decide that it would be best to remain in hiding.
If you watch a video on it, They are amazed.
I can't really answer this for you. I would love to write the essay for you but, I don't have time and this is your work. Here are some tips:
Gather the information that you'll need and then decide on how you want to start the essay. Say stuff like, If I was to be a nurse than.......or My grandfather has influenced me because.....
Then once you have your beginning paragraph, work on your body paragraphs, putting the least exciting information to most exciting information. Then wrap up your essay and conclude what you were talking about. Make sure you keep your readers attention. Hope this helps!