" The sniper must not be susceptible to emotions such as anxiety and remorse" does anybody know the meaning??​

Now I don't know but I'm gonna say how I believe it.

Explanation:

I believe the meaning of the phrase is about how snipers have to assassinate people, and so if they feel any remorse or any anxiety, they can fail. As a saying, I believe it would mean if you have to do something bad, or you have to kill something. If you have any regret or feel anxiety, you can and will crumple under the pain of what you did. Hope this helps.

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

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