Which type of plate boundary would be most likely to lead to above-ground volcanic activity?

Convergent plate boundary most likely lead to above-ground volcanic activity.

Explanation:

At convergent plate boundary two or more tectonic plates collide, which causes one layer to slide beneath the other. Earth's gravity pulls the lower layer into the mantle. Oceanic plate can sink beneath the continental plate and vice versa. This process of subduction leads to above ground activities such as earthquakes and volcanic eruptions.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72