active volcanoes are volcanos that erupt within a short amount of time. usually around 70 years. while inactive volcanoes are volcanoes that didnt erupt in centuries and arent showing signs of erupting anytime soon
- the inflation theory proposes a period of extremely rapid (exponential) expansion of the universe during its first few moments. it was developed around 1980 to explain several puzzles with the standard big bang theory, in which the universe expands relatively gradually throughout its history.
maybe it's letter b?
it's not poisonous so it's not letter b.
also those are nit metals
as far as i remember, metalloids is composed or. combined by metal and the other one (just forgot)
so i thinj it's letter b.