Answer: 1. One common mistake that adults make when singing with children is that they tend to “pitch” the songs, (or sing them in a key), that is comfortable for themselves, but unfortunately, out of a comfortable singing range for the children. Adults sing in much lower range than children, therefore pitching a song too low causes children to be unsuccessful at reaching some of the lower notes.

Answer 2. I don't know what you mean by "cut plants". Plants respire when they can't get enough energy to subsist on via photosynthesis. This usually happens at night or, for plants that shut down for part of the year, during the cold/dry season. If you mean cutting a plant down, the reason why plants die when cut is because they can no longer transport water, so they dehydrate to death;all of the chemistry that allows plants to live, either when photosynthesizing or when respiring, takes place in water, so without water a plant is dead.

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