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.
I believe the answer is C! The opposite sides are parallel
More carbon dioxide is stored in the ocean water, making it more acidic, which is dangerous for most corals and many animals with small niches
Some of the US states that borders Canada are Minnesota, New York and Idaho