Which process will directly result in organic matter being added to the soil? water freezing in cracks of rocks

glaciers carving out a valley

river water eroding the banks of a stream

bacteria breaking down dead matter

What are the most explosive events that occur on the sun? umbras solar flares solar winds prominences

What causes darkening of the skin as melanin production increases

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases