Answer:
a border surrounding the zone of strong gravity near a black hole
Explanation:
The context clues , extreme zone is a boundary called the event horizon. This boundary acts like a point of no return. Once past it, there's no going back. Only black holes have such extreme gravity zones, and only black holes have event horizons " show that event horizon is a border surrounding the zone of a strong gravity near a black hole
I think the answer is imagery
People who make blue light i have no clue i think thats it
People can overcome barriers by talking to people and talking about what is causing them to stop.
A is the correct answer for this question...