Answer:
"Mountains and Molecules" introduces readers to the text by describing the author's experience of backpacking in the Sierra Nevada Mountains and feeling a deep connection to nature. The text goes on to discuss the author's fascination with the interconnectedness of all living things and the relationship between the natural world and the molecules that make up all living organisms. This introduction sets the tone for the rest of the text, highlighting the themes of adventure, exploration, and the beauty of the natural world.
