Which statements help explain this result? Check all that apply.

What was the first instrument to ever record an earthquake?

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?

What is the relationship between ozone and smog?