I would prefer to use a document such as an id for proof of identification, I think this because although face identification may be quicker, having physical documentation of who you are is much safer and has much higher rates of success when identifying someone.
The purpose of a hook in an intro is to grab the reader's attention.
I thought it was the third one. only because a topic sentence should always relate to your essay but providing details would allow yourself to briefly explain your essay more in order for the reader/marker to gain a better understanding of your point of view
Read the important events and underline the main idea