The form of life first that appears in the fossil record 175 million years ago is mammals (Option C).
What are mammals?
Mammals are vertebrate animals characterized to have mammal glands which are used to nourish the offspring during their development, this group is considered the latest higher group of vertebrates.
In conclusion, the form of life first that appears in the fossil record 175 million years ago is mammals (Option C).
Learn more about mammal evolution here:
https://brainly.com/question/1105186
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