Prepositions are words that are used to indicate a location, time, or direction. In this case, the word "under" would be the preposition since it shows the location of where the children sat.
There must be something in books, something we can’t imagine, to make a
woman stay in a burning house; there must be something there. You don’t
stay for nothing.
Answer: B
explanation: nuclear energy harms the environment
The answer is to explain the sever difficulties faced by doctors.