What is the evolutionary evidence that endosymbiosis is real?

Most important are the many striking similarities between prokaryotes (like bacteria) and mitochondria: Membranes — Mitochondria have their own cell membranes, just like a prokaryotic cell does. DNA — Each mitochondrion has its own circular DNA genome, like a bacteria's genome, but much smaller.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

not too sure but maybe in the hot springs.