There is no underlined word.....
A dependent clause is a clause that cannot stand on its own and make sense which is why it requires an independent clause to give it meaning.
Answer:
COol! glad you have so many good teachers
I believe it is D, it talks about how the forest is very dense and at the bottom of the mountain, therefore the trees are surrounding it
The first answer is D The second one Is C The third one is D (I'm not really sure if its D or B) and the last one is D as well! Good Luck