https://en.wikipedia.org/wiki/Western_Roman_Empire
The correct answer is a,b and c.
a) its core becomes a white dwarf.
b) its outer layers form a nebula , or vast cloud of gas and dust.
c)its outer layers expand , and the star becomes a red giant.
Conquistadors are Spanish soldiers
Aztec were people who were a group like the Natives but called something different
A. The sediment was placed in Florida by humans. - correct choice
What is ejected from a volcano like ash,blocks solar radiation from reaching earth’s surface. Therefore it lowers the surface temperature.