Which data is used to make a sonar map of the ocean floor?(1 point)

Sonar is a pulse, so the answer with the pulse described

so watch one

choices one of the choices

the one with the pulse

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1. The time it takes for a pulse to bounce from the ocean floor

2. The Atlantic Ocean is getting larger, while the Pacific Ocean is getting smaller.
3. Younger rocks are warmer and are located closer to mid-ocean ridges
4. Age
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