Great reasons to have plants in your tank: Plants are great hiding places for fish who are being bullied by other fish or newborn fry. If you have live plants, they can provide the necessary oxygen for your fish to survive. The plants can filter out waste, as well as provide an extra food source for your fish. Plants also assist in algae prevention.... there ya go! I hope this was helpful.
*I am missing one photo in between the second and third (will be added ASAP)