Answer:
<em>3) At the time of a full moon</em>
Explanation:
<em>Lunar nodes are the locations where the Moon crosses the Earth's orbital plane. Total lunar eclipses happen only when: It is Full Moon. At the same time, the Moon is at (or very near) a lunar node, so the Sun, the Moon, and the Earth are aligned in a straight (or nearly straight) line.
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<u><em>Hope this helps!</em></u>
<u><em>Please mark brainliest!</em></u>
