What drove Robert D. Ballard's quest to find the Titanic?

Robert Ballard was a deep sea explorer with a dream to find the Titanic. The US Navy asked Ballard to find and photograph two sunken submarines in the Atlantic on a secret mission. When Ballard looked for the submarines he realised a crucial piece of information.

Explanation:

“As his language and purpose show,Ballards quest was driven by a love of science and a passion for the titanic.

Explanation: got it right on Ed

many scientists' predictions of climate change include: warmer temperatures, rising sea levels, and more frequent storms.

that is the wrong

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).