At first you have to write the variables out which are
now you have to combine like terms
now you add these two variables and end up with answer of
The first step in the formation of a hotspot volcano is lava erupts and forms an island. Magma<span> generated by the </span>hot spot<span> rises through the rigid plates of the </span>lithosphere<span> and produces active volcanoes at the Earth's surface.</span>
The SunBelt is a region defined by warm climate of the United States. Is not a political example although this region coincide with a very fast growing economy and population for the last decades.
Corect answer is C - a formal example
The ozone layer is comprised of ozone, an atom which is constructed of 3 oxygen molecules.
Hope that helped =)
