Respuesta :
The answer is "Apollo astronauts took additional classes: astronomy, Earth geology, life sciences, and geology of the Moon.", or the first option. A colon is needed there because it shows what is being taught. I hope this helps!
Which correctly shows where a colon is needed in the sentence?
Apollo astronauts took additional classes: astronomy, Earth geology, life sciences, and geology of the Moon.
Apollo astronauts took: additional classes astronomy, Earth geology, life sciences, and geology of the Moon.
Apollo astronauts took additional classes astronomy, Earth geology, life sciences: and geology of the Moon.
Apollo astronauts took additional classes astronomy: Earth geology, life sciences, and geology of the Moon.
The answer is:
Apollo astronauts took additional classes: astronomy, Earth geology, life sciences, and geology of the Moon
The first choice is the answer because you are listing a number of things so you'd use a colon before the list.