How can a scientist predict how explosive the eruption of a volcano will likely be? by using a cospec to check the gases by using a tiltmeter to check the ground swelling by studying the composition of its volcanic rock by determining if the volcano is active, dormant, or extinct

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

d.embryo is the correct one