If you have choices, it would be really helpful if you'd include them with your question, but I'd say
More than half of the forests in the Czech Republic have been destroyed by pollution.
The main vent is the main outlet for the magma to escape. Secondary vents are smaller outlets through which magma escapes. The crater is created after an eruption blows the top off the volcano
E. indoor plumbing
because this comes in agriculture wich hellped southeast development
