Question

which sentence uses this meaning of composition?
composition noun what something is made up of
nasa’s mars exploration rover mission examined the composition of the soil on mars.
kaylee wrote her composition about pioneer women raising large families on the frontier.

Explanation:

To determine which sentence uses "composition" meaning "what something is made up of", we analyze each:

• First sentence: "NASA’s Mars Exploration Rover mission examined the composition of the soil on Mars." Here, "composition" refers to what the Martian soil is made of, matching the definition.
• Second sentence: "Kaylee wrote her composition about pioneer women..." Here, "composition" means a written piece (like an essay), not the makeup of something.

Answer:

NASA’s Mars Exploration Rover mission examined the composition of the soil on Mars.