When a descriptive word, phrase, or clause is essential to the meaning of a sentence, that element is RESTRICTIVE
I got d but I am not sure yet
Answer:
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Explanation:
Frequency is the number of waves that pass<span> a </span>given point<span> in a certain </span>amount<span> of </span>time<span>. The frequency and wavelength of a </span>wave<span> are related. When frequency increases more </span>wave<span> crests </span>pass<span> a fixed </span>point<span> each second. hope this helps!
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