C. Read each sample research problem. Identify the main focus of each research problem if it is the use of “words” or “numbers.” Explain your answers in two or three sentences. Experiences of children in single-parent homes
Main focus (words/numbers):
Explanation:

Ex: words
(Type your explanation in the second box why you answered words)

the correct choice is a .

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the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.