Who made major contributions to environmental protection in the early 1900s?
a. president lincoln
c. president roosevelt
b. president grant
d. president taft

How were the okanogan highlands formed? a. by subduction, which caused huge folds in earths surface b. as a result of retreating glaciers carving great valleys into the earth c. when molten rock from under the earth approached the surface d. when the collision of volcanic island chains and ocean rocks formed new earth