Anything with -er added to the end. For instance, clos-er or farth-er.
The superlative form ends in -est. For instance, clos-est or farth-est.
Answer:
The book that you are holding is the one I want.
Explanation:

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:
B. Excitement
Explanation:
If he felt anything else he wouldn't have written anything about them :)
Please mark me brainliest