Answer:
Some satellites help by investigating faraway objects that may be heading toward Earth.
Explanation:
The sentence that uses a synonym as a context clue to explain the meaning of the word <em>exploration</em> is: <em>Some satellites help by investigating faraway objects that may be heading toward Earth.</em><em> </em>
Synonyms are words that have similar or the same meaning. The synonym of the word <em>exploration</em> in the given case is <em>investigating</em>. These words don't have identical meanings, but both of them can help us understand what the other one means.
I am actually only in 5th grade I do not know the story.
