Explanation:
Riyadh is the capital of Saudi Arabia
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Answer:
<h2><em><u>B</u></em><em><u>.</u></em><em><u> </u></em><em><u>Mercury</u></em></h2>
Explanation:
The planets <em><u>Mercury and Venus </u></em> don't have a natural satellite.
Measuring in light-years also allows astronomers to determine how far back in time they are viewing , Because light takes time to travel to our eyes. Everything we view during the dark in night has already been happened.
The country of Brazil & Bolivia are the pair which share a border.
The border in this context refers countries which shares a close or immediate boundary. For instance, the nation of U.S. and Canada shares a border.
Here, the pairs including "Belgium & Bulgaria", "Belize & Barbados" and "Belarus & Bangladesh" does not share a boundary.
Hence, the country of Brazil & Bolivia are the pair which share a border.
Therefore, the Option B is correct.
Missing options includes <em>"a. belgium & bulgaria b. brazil & bolivia c. belize & barbados d. belarus & bangladesh."</em>
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<em>brainly.com/question/1336648</em>
