I believe it is C hope i helped!
Answer:
n musical notation, stems are the, "thin, vertical lines that are directly connected to the [note] head." Stems may point up or down. ... There is an exception to this rule: if a chord contains a second, the stem runs between the two notes with the higher being placed on the right of the stem and the lower on the left.
Explanation:
The answer is: Expressive vocabulary
Expressive vocabulary refers to the combination of all the words that a person has acquire throughout his/her life and can be used in various type of situations.
This would include all words in the child vocabulary, starting from the child's written language, spoken language or even the child's manually signed words.
In a surface wave (like water) the water goes up and down, but the wave travels across (parallel to) the surface.
1 watt = 1 joule per second = 1 newton meter per second = 1 kg m2 s-3