The answer should be climax sorry I just saw your question today I hope I wasn't to late and if I was I'm really sorry
The dangers that scientists face when they study volcanoes is the danger of being killed by the hot lava if it erupts so they put their life at risk by studying these dangerous natural disaster.
Answer:
liuat may be don't know sorry if wrong
The tree created a great hindrance to traffic as it lay across the road.
I would say the best answer is A. Answer choice B is rather absurd and answer choice C doesn't exactly make any sense.