On a trip to the beach, Jacob noticed many signs that read "Keep off dunes." His mother told him that walking or digging on the
dunes make them vulnerable to erosion. What other human activity would also contribute to the erosion of the sand dunes? a. building new dunes where none exist b. restricting construction near the dunes c. destroying the beach grass on the dunes d. adding sand from the ocean to the dunes
Bears sweat during hibernation because of their fur. Their sweat is actually very valuable in chinese traditional medicine so that could be a problem I guess. I hope this helps.
