Repeat or step through the run specified above (in the Introductory Mode) as many times as necessary to track the first energy unit that originated...

Repeat or step through the run specified above (in the Introductory Mode) as many times as necessary to track the first energy unit that originated from the Sun. As it arrives at the planet's surface, the yellow energy unit changes to ________. This signifies its transition from sunlight to heat energy as it is absorbed into the planet's climate system. a. green b. blue c. red