Nancy took a breath and gathered her thoughts. She imagined that passing through the gray-zone door into Level 4 was like a space walk, except that instead of going into outer space, you went into inner space, which was full of the pressure of life trying to get inside your suit. People went into Level 4 areas all the time at the Institute, particularly the civilian animal caretakers. But going into a containment zone to perform a necropsy on an animal that had died of an amplified unknown hot agent was something a little different. This was high-hazard work. The central idea of this excerpt is that working in a containment zone is very dangerous. Which phrases from the excerpt most support the central idea

The phrases  "But going into a containment zone to perform a necropsy on an animal that had died of an amplified unknown hot agent was something a little different," and the "This was high-hazard work." supports the central idea that working in a biological containment zone is very dangerous. The first few sentences shows that Nancy is preparing herself for the gray-zone door, and it also states they are wearing something like a suit or space suit possibly. If they are wearing space suits, this shows there is a very high danger behind the door.

Explanation:

-The Hot Zone.

I read the full book and also got this on a quiz in edge recently.

i would say it means that you're never alone, that there will always be people supporting me and showing me that they care for me and love me

explanation:

i may be wrong but i think your answer is flashback