Its d. ellos prefieren las botas azules
Answer: A) Natalia conoce a mis hermanas
Explanation Ella conoce : tercera persona singular presente de indicativo del verbo conocer.
Hope this helps!
El tono, it means tone, in the first sentence it says “aparente de la voz” and conflict isn’t a voice, an argument isn’t a voice, and a character isn’t a voice, so the answer is b, el tono
gracias que tengas un buen día(thank you have a nice day) is in my opinion the most common phrase and easiest to learn to a non-speaking spanish person.