Q: Fact 1: Most ecosystems get energy from sunlight. Fact 2: Sunlight is a form of electromagnetic energy. Given the two facts above, what do ecosystems get energy from?

Available choices: [I] colors of the spectrum. [II] fossil fuels. [III] during the day. [IV] our star. [V] electromagnetism. [VI] In their leaves. [VII] rays or beams. [VIII] sun's heat.
A:
[V]