Q: You are presented with the quiz "what do ecosystems get energy from?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "most ecosystems get energy from sunlight" and "sunlight is a form of electromagnetic energy". So, what's the best answer to the question?

Pick your answer from: (1). colors of the spectrum (2). fossil fuels (3). during the day (4). our star (5). electromagnetism (6). In their leaves (7). rays or beams (8). sun's heat
A:
(5).