Who holds the record for the deepest dive in history? a Robert Ballard on ALVIN b Piccard and Walsh on Trieste C Jacques Cousteau on Calypso d Sylvia Earle on Deep Rover

## Step 1<br />The question is asking for the person who holds the record for the deepest dive in history. The options provided are Robert Ballard on ALVIN, Piccard and Walsh on Trieste, Jacques Cousteau on Calypso, and Sylvia Earle on Deep Rover.<br />## Step 2<br />The correct answer is Piccard and Walsh on Trieste. This is because they set the record for the deepest dive in history. They reached a depth of 35,787 feet (10,994 meters) in the Challenger Deep of the Mariana Trench in 1960.<br />## Step 3<br />The other options, Robert Ballard on ALVIN, Jacques Cousteau on Calypso, and Sylvia Earle on Deep Rover, are all notable figures in the field of oceanography and underwater exploration. However, none of them have set the record for the deepest dive.