I guess it means elephants are smart
Answer: tone
Tone is the attitude an author expresses through words.
Some people would think that the answer would be mood, but mood would be a whole different example. Mood is the attitude through signs of face and actions, tone is by the voice or the words from mouth.
Answer:
1.b2.a3.c4.b5.d6.d7.a8.d9.c10.d