When you speak, your tone of voice can convey what you mean. For example, you could say, "What a funny joke. You must be a comedian." Depending on how you say it, you might mean that sarcastically or genuinely. It all depends on your tone. In the same way, the tone in a piece of writing is the author's attitude toward their subject. Authors won't just tell you their tone. You have to "listen" to find it by reading between the lines.
Read the following passage.
This house isn't perfect, but it's where my babies grew up. I know it all by heart. I know every stain on the carpet, every creaking floorboard and every paint chip on the windowsills. Each corner of this small space is filled with memories that I relive when I walk through the narrow hallways.
What words best describe the author's tone in the passage above?