The tone of the passage can be described as enthusiastic and hopeful, as it conveys a sense of positivity and motivation while explaining complex concepts. Words like optimistic and encouraging reflect the passage’s intent to inspire confidence in the reader, making the scientific content feel accessible and engaging. The use of a supportive tone reassures the reader that the information is valuable and worth exploring. Additionally, the passage has an upbeat quality, making it more likely to inspire curiosity and further learning. Overall, the tone encourages the reader to approach the topic with a sense of excitement and possibility.