Question

What technology was used to map features on the seafloor? -Echo sounding

-plate tectonics
-eutrophication
-transducer

Answer 1

Echo sounding

Step-by-step explanation:

Echo sounding is the key method scientists use to map the seafloor today. The technique, first used by German scientists in the early 20th century, uses sound waves bounced off the ocean bottom.

Answer 2

First option, Echo sounding