Attribution studies focus on determining whether or not earth's climate has changed in a statistical sense.

a.) yes

b.) no

which of the following is true about fossils? a. the relative age of fossils cannot be determined from their position in sedimentary layers. b. fossils found in lower layers of sedimentary rock are as old as fossils found in upper layers of sedimentary rock. c. fossils found in upper layers of sedimentary rock are older than fossils found in lower layers of sedimentary rock. d. fossils found in lower layers of sedimentary rock are older than fossils found in upper layers of sedimentary rock.

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d. fossils found in lower layers of sedimentary rock are older than fossils found in upper layers of sedimentary rock.

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