The statement which provides the best introduction to the passage is; Millions of years ago, life on earth began in giant bodies of water. Since then, marine creatures have been changing to adapt to their environment.
<h3>Introductory Paragraphs</h3>
An introductory paragraph introduces the main idea of an essay or passage, captures the interest of your readers, and tells why one's topic is important.
On this note, it follows that the best introduction to the passage as titled in the question is; Millions of years ago, life on earth began in giant bodies of water. Since then, marine creatures have been changing to adapt to their environment.
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