What is a mountain range that serves as a border between two countries

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.

it would be 2 or b because the clouds are a form of condensation