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salmon fossils are found more often than stingray fossils because:

there were more salmon than stingrays
salmon died more often than stingrays
cartilage is softer than bone and does not preserve well
stingrays have hollow bones that do not make good fossils

the correct answer is C. cartilage is softer than bone and does not prerserve well

Explanation:

Fish fossils are usually divided into two main groups. One group includes fish with true bones, like salmon, bass, and goldfish. Scientists have found true bone fossils that are over 360 million years old. The other group includes fish with skeletons made of cartilage. Sharks, eels, and stingrays belong to this group. Most fish fossils are from species with true bones. Cartilage is softer than bone, and does not preserve as well.

this is from my school work assignment this is the correct answer, hope this helps

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."