Multiple choice

Directions: Complete the following sentence by using the best option from the given choices so that the sentence makes coherent sense. All along., space explorations have meant studying the planets, the Moon and looking for __________ life.

  1. terrestrial

  2. extraterrestrial

  3. heavenly

  4. planetary

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Extraterrestrial means outside Earth or from outer space, which is the logical opposite of terrestrial. Space exploration specifically looks for life beyond Earth, making extraterrestrial the precise scientific term.

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