Which words in the sentence are adverbs? the next group then quietly found their places on the dark stage. choose all answers that are correct. a. next b. dark c. then d. quietly

"quietly" is the only adverb in this sentence. Adverbs always (with some very rare exceptions) modify and explain the verb, which in this case is "found".

To form soil, the two processes which must occur are erosion and weathering, so the correct answer is "soil formation is a continuous presses, but also one which takes a long time, it can sometimes take more than five hundred years for 1cm of soil to form.