Choose all the answers that apply. The sun .

is the only star in our solar system
is the largest star in the Milky Way galaxy
is made mostly of hydrogen and helium
will continue to release light and heat forever
has a solid core made of iron and nickel

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.