Which occurs just before a volcanic eruption?

Most of the time a earthquake happens

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Explanation:

To expand on the other persons answer, before an eruption the area around the volcano will most likely start experiencing earthquakes or tremors, this is because magma and chunks of rock are pushing through the earths crust. Other things are also common, such as hot springs near the soon to erupt volcano may change in temperature or new hot springs may form.

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.

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explanation:

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