I would say B. to have a thorough knowledge of grammar
Answer:
A
Explanation:
i am trying to make a good guest
She is proud her son met some one. i have no idea honey you need to put what book or excerpt it is from..

The harmonic frequency refers to the resonant frequency that is an integral multiple of the fundamental frequency, harmonics are usually simple sinusoidal oscillation at a single frequency. where as Resonance frequency are frequencies that are not necessarily sinosudal or integral multiple of fundamental frequency and it may have complex oscillations made up of multiple harmonics ~
It's like if you play a piano with a single key, it will show harmonic frequency, but if you use multiple keys at a time it may show Resonance.
Answer:
Junk food is unhealthful food, that is high in calories
Explanation:
with little protein, vitamins