Select the option that can be used as a one-word substitute for the underlined group of words.

After my father passed away, I used to look at a series of stars, trying to find the unknown.

Constellation

The option that can be used as a one-word substitute for the underlined group of words is constellation.

• Galaxy is a large grouping of stars, gas, and dust held together by gravity.
• Constellation is a group of stars that appear to form a particular shape in the sky.
• Caravan is a group of travelers or vehicles moving together.
• Horde is a large, unruly crowd or mob.