Please help 10 points for answers!!

Any sound above what db can cause hearing loss in human beings

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

Amarine ecologist has constructed the conceptual model shown in the diagram. what predictions can be made from using this model? where the tertiary consumers get their energy how often primary producers are able to reproduce when bacteria and fungi initiate the process of decomposition whether other secondary consumers are present