The answer is d.
hope this helps!!
Answer:
Earth's upper atmosphere tends to expand during solar maximum, exerting drag on satellites in low orbit
Explanation:
There are also more 'solar storms', flares and CMEs during solar maximum, than during solar minimum which can also crash the satellite.
The tiny, solid particles you find in the atmosphere serve as cloud condensation nuclei.
You see, in order for water to condense, the water must have a direct object, grammatically speaking.
<span>Your answer: Tiny, solid particles in the atmosphere play a role in cloud formation by providing the object upon which water may condense to form clouds.</span>
The answer is going to be c.