As underwater exploration continued, Robert Ballard, a marine scientist, realized scuba divers and submersibles were limited in how far they could descend. His name has become ..... with pioneering the use of remote controlled vehicles for exploration.

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As underwater exploration continued, Robert Ballard, a marine scientist, realized scuba divers and submersibles were limited in how far they could descend. His name has become ..... with pioneering the use of remote controlled vehicles for exploration. (*) synchronize (*) sympathetic (*) synonymous (*) syncline

This is a companion discussion topic for the original entry at https://english.best/questions/21957,as-underwater-exploration-continued-robert-ballard-a-marine-scientist-realized-scuba-divers-and-submersibles-were-limited-in-how-far-they-could-descend-his-name-has-become-___-with-pioneering-the-use-of-remote-controlled-vehicles-for-exploration/