1. Tom Sawyer is a boy.

Based on the text, Tom Sawyer is described as a boy who gets bored during summer holidays and decides to start treasure-hunting. The options provided are 'naughty', 'clever', and 'bad'. The text does not explicitly label Tom with any of these adjectives in relation to his general character as a boy. However, the context of his adventures and actions might imply certain traits. Without a direct statement, it's impossible to definitively choose from the given options based solely on the provided text. The question seems to be asking for a general description not explicitly stated. Therefore, no answer can be definitively selected from the text.