Answer:
Because his uncle is honest and skilled.
Explanation:
Well, you need to give us the choices before we can give an exact answer but normally you can evaluate the tone by thinking about the context and meaning.
some examples of strong disapproval might be: "She's such a horrible person" or "I really hate this lamp it's ugly" The bolded words show the strong disapproval.
But most likely you should be able to find it by evaluating tone.
Young Mary Lennox is orphaned by an earthquake in India and sent to England to live with her uncle in a cold ancestral manor in Yorkshire. Mary briefly meets him, still mourning for his wife who died ten years ago, but she is mostly left on her own. A resourceful and inquisitive girl, she soon makes two exciting discoveries. First she finds an overgrown secret garden, the favorite of her aunt and locked up since her death. Second, that she has a cousin, Colin, a sickly boy who has been told he must remain in bed out of the daylight at all times. Once Mary and another new friend, Dickon, have brought the garden back to life they decide Colin must see it, a decision that will change several lives.