Correct option is C
The correct option to fill in the blanks is "evolved; existed."
Explanation of correct answer: The passage discusses how reptiles evolved from amphibians and existed in various forms for millions of years. The words "evolved" and "existed" accurately describe the biological and historical context.
Example of correct answer in a sentence: "Reptiles evolved from amphibians and existed in numerous shapes and sizes."
Meanings of other options:
· Developed; continued: "Developed" can be used similarly to "evolved," but "continued" does not fit the context as well as "existed."
· Came; exhausted: "Exhausted" is incorrect because it implies depletion, which does not fit the context.
· Involved; lived: "Involved" is incorrect as it doesn't relate to evolution.