Scientists counted all the different types of trees in osborne forest in 1950 and then again in 2000. the scientists saw that osborne forest did not change very much during the 50 years. what did change in osborne forest? a. birch trees accounted for 40% less of the forest's trees in 2000. b. birch trees accounted for 40% more of the forest's trees in 2000. c. beech trees accounted for 30% less of the forest's trees in 2000. d. beech trees accounted for 30% more of the forest's trees in 2000.

A. Birch trees accounted for 40% less of the forest's trees in 2000.

Explanation:

Between 1950 and 2000, birch trees began to be used a lot in the production of furniture, floors and plywood, which caused the specimens of this tree in the forests to decrease over time. This is because its wood makes it possible to manufacture a cheap and accessible material for the majority of the population, for this reason, birch trees represented 40% less than trees in the forest in 2000, when scientists analyzed the data of their research.

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.