I believe the answer is a) metabolism bc metabolism is when the sum of chemical reactions take place in each cell of a living organism
<span>B. es
</span>
We use "es" to refer where someone is from.
The answer to this question would be frequency.
The pitch of a sound makes is directly related to the frequency of the vibration. For every octave, the number of frequency will be increased 2 times. The frequency is influenced by various things. Changing the length of the instrument is the easiest method to change the frequency.
