Who composed Orfeo and was also recognized for having solidified early experiments with music dramas into the genre now called opera

Ablind girl lost her pencil, book and what did she lose first? (this is really good for people who don't have an adequate amount of points! )

What character trait emerges as a result of jing-mei’s conflict with her mother?

One of the researchers mentions that he is looking for "affiliation cues" in the video recordings of the experiment. how would you describe what these affiliation cues indicate?