Science! please help does anyone know this

b- destructive interference that results in a lower amplitude

c- destructive interference that results in a greater frequency

d- constructive interference that results in a lower frequency

b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.

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explanation:

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i believe that it is a exoplanet